Phylum Arthropoda
Gravenhorst, 1843

Species in this portal

2464

Ecological class

920 troglobionts, 447 trogloxenes, 416 stygobionts, 375 troglophiles, 151 accidentals, 92 stygoxenes and 63 stygophiles

Realm

Aquatic, Terrestrial

Continent

North America

Countries

Canada, Mexico, United States

States and provinces

50 states and provinces

Counties

889

Karst regions

Appalachians, Black Hills, Driftless Area, Edwards Plateau and Balcones, Florida Lime Sinks, Guadalupe Mountains, Hawaii, Interior Low Plateau, Mother Lode, Other, Ozarks

Habitats

Cave pool, Hypotelminorheic seepage, Cave stream, Cave lake

Cave zone

Deep cave

Conservation

857 of 1144 ranked G1 or G2; 30 federally listed

Child taxa

• Branchiopoda 2 in portal
• Chelicerata 612 in portal
• Copepoda 2 in portal
• Crustacea 564 in portal
• Hexapoda 1051 in portal
• Myriapoda 233 in portal

Species in this portal

• Abacion lactarium
• Abacion magnum
• Acanthocyclops brevispinosus
• Acanthocyclops einslei
• Acanthocyclops exilis
• Acanthocyclops parasensitivus
• Acanthocyclops robustus
• Acanthocyclops venustoides
• Acanthocyclops vernalis
• Acanthophthirius longa
• Achemenides pectinatus
• Aclodes nicuesa
• Acroneuria abnormis
• Acrotrichis lucidula
• Actia diffidens
• Adelocosa anops Kauai Cave Wolf Spider G1G2 HI
• Aedes abserratus
• Aedes aurifer
• Aedes canadensis
• Aedes cinereus
• Aedes communis
• Aedes fitchii
• Aedes provocans
• Aedes punctor
• Aedes sticticus
• Aedes stimulans
• Aedes triseriatus
• Aedes vexans
• Agastoschizomus texanus TX
• Agelenopsis pennsylvanica
• Agonum extensicolle
• Agonum punctiforme
• Agyneta gagnei G1G2 HI
• Agyneta hedini CO, NM
• Agyneta unimaculata
• Alabamocreagris mortis Alabama pseudoscorpion G1G2 AL
• Alabamocreagris pecki G1G2 AL
• Albiorix anophthalmus G1G2 AZ
• Alectorobius concanensis
• Alectorobius kelleyi
• Aleochara castaneimarmotae
• Aleochara castaneipennis
• Aleochara fumata
• Aleochara lucifuga
• Aleochara ocularis
• Allocosa funerea
• Allocosa sublata
• Allocrangonyx hubrichti Hubricht's Long-tailed Cave Amphipod G3G4 AR, MO
• Allocrangonyx pellucidus Oklahoma Cave Amphipod G2G3 MO, OK
• Allomideopsis wichitaensis TX
• Alloparasitus subterraneus
• Allotexiweckelia hirsuta G2G3 TX
• Almuerzothyas comalensis GNR TX
• Alocodesmus angustatus
• Aloconota diversiseta
• Aloconota insecta
• Aloconota neospelea
• Aloconota sulcifrons
• Alucita huebneri
• Amara musculis
• Ameractis satis G2G4 AL, GA, TN, VA
• Americina adusta
• Americocreagris columbiana G2G3 OR, WA
• Amerigoniscus centralis G1G2 OK
• Amerigoniscus curvatus G1 GA
• Amerigoniscus georgiensis G1 GA
• Amerigoniscus gipsocolus G1G2 NM, TX
• Amerigoniscus henroti Powell Valley Terrestrial Cave Isopod G3 VA
• Amerigoniscus malheurensis G1 OR
• Amerigoniscus nicholasi G1G2 GA, TN
• Amerigoniscus proximus G1G2 GA
• Amerizus wingatei
• Ameroduvalius jeanneli G3 KY
• Amnestus subferrugineus
• Amoebaleria defessa
• Amphasia interstitialis
• Amplaria flucticulus CA
• Amplaria shastae G1G2 CA
• Amydria arizonella
• Anachemmis jungi CA
• Anahita punctulata
• Anargyrtes annulata
• Anasaitis canosus
• Andrognathus corticarius
• Anevrina olympiae
• Anillaspis explanata CA
• Anillinus actuipennis TX
• Anillinus bexarensis TX
• Anillinus cavicola AL
• Anillinus clinei AL
• Anillinus folkertsioides
• Anillinus forthoodensis TX
• Anillinus hildebrandti AL
• Anillinus longiceps TN
• Anillinus reddelli TX
• Anillinus smokiensis TN
• Anillinus tombarri AL
• Anillinus valentinei G3G4 AL
• Anillinus wisemanensis TX
• Anisodactylus opaculus
• Anisolabis howarthi G1G2 HI
• Aniulus nigrans
• Anopheles earlei
• Anopheles punctipennis
• Anopheles quadrimaculatus
• Anotylus exiguus
• Anotylus tetracarinatus
• Anthicus cervinus
• Anthrobia coylei G2 KY, TN, VA, WV
• Anthrobia monmouthia Mammoth Cave Spider G5 AL, KY, TN, VA
• Anticarsia gemmatalis
• Antrodiaetus unicolor
• Antrolana lira G2G4 VA, WV
• Antroxestoblatta immaculata
• Anurida tullbergi
• Anyphaena celer
• Aphaenogaster tennesseensis
• Apheloria corrugata
• Apheloria montana
• Apheloria virginiensis
• Aphrastochthonius grubbsi Grubb's Cave Pseudoscorpion G1 CA
• Aphrastochthonius pachysetus G1G2 NM
• Aphrastochthonius pecki G1 AL
• Aphrastochthonius similis Carlow's Cave Pseudoscorpion G1 CA
• Aphrastochthonius tenax G1G2 AL
• Apocheiridium reddelli G1G2 TX
• Apochthonius coecus G1G2 VA
• Apochthonius colecampi G1G2 MO
• Apochthonius diabolus G1 AR
• Apochthonius forbesi G1G2 OR
• Apochthonius grubbsi G1G2 CA
• Apochthonius hobbsi Buckskin Cave Pseudoscorpion G1 OH
• Apochthonius holsingeri G1G2 VA
• Apochthonius indianensis Indiana Cave Pseudoscorpion G1 IN
• Apochthonius malheuri Malheur Pseudoscorpion G1G2 OR
• Apochthonius minor G1 GA, TN
• Apochthonius moestus
• Apochthonius mysterius Mystery Cave Pseudoscorpion G1G2 MO
• Apochthonius paucispinosus Dry Fork Valley Cave Pseudoscorpion G1 WV
• Apochthonius russelli Russell Cave Pseudoscorpion G1 AL
• Apochthonius titanicus G2 AR
• Apochthonius typhlus Stone County Cave Pseudoscorpion G1G2 MO
• Appaleptoneta barrowsi G1 AL
• Appaleptoneta credula G1 AL
• Appaleptoneta fiskei GNR GA
• Appaleptoneta jonesi G1 AL
• Aquarius conformis
• Aquarius remigis
• Araneus cavaticus
• Araneus diadematus
• Araneus marmoreus
• Arenophilus bipuncticeps
• Argyrodes nephilae
• Arianops cavernensis GNR AL
• Arianops gorei TN
• Arianops jeanneli G1 VA
• Arianops pecki TN
• Arianops steevesi GNR AL
• Arianops stygica G1 TN
• Armadillidium nasatum
• Armadillidium vulgare
• Arrhopalites benitus
• Arrhopalites caecus
• Arrhopalites dubius
• Artesia subterranea G1G2 TX
• Artesia welbourni G1G2 TX
• Atheta alabama
• Atheta annexa
• Atheta klagesi
• Atheta lucifuga
• Atheta troglophila
• Atranus pubescens
• Attagenus brunneus
• Attheyella illinoisensis
• Attheyella nordenskioldi
• Attheyella nordenskioldii
• Attheyella pilosa
• Australinocreagris grahami G1G2 CA
• Austrotyla awishoshola NM
• Austrotyla coloradensis CO
• Austrotyla montivaga
• Austrotyla specus
• Austrotyla stephensoni CO
• Axonopsella bakeri FL, TX
• Azilia affinis
• Azilla affinis
• Bactrurus angulus Cumberland Gap Cave Amphipod G1 TN, VA
• Bactrurus brachycaudus G4 IL, MO
• Bactrurus cellulanus GX IN
• Bactrurus hubrichti Kansas Well Amphipod G4 KS, MO, OK, VA
• Bactrurus mucronatus G5 AR, IA, IL, IN, MI, MO, OH
• Bactrurus pseudomucronatus False Sword-tailed Cave Amphipod G2G3 AR, MO
• Bactrurus speleopolis Cave City Cave Amphipod G1 AR
• Bactrurus wilsoni G1G2 AL
• Bakerdania quadratus
• Banksula californica Alabaster Cave Harvestman GH CA
• Banksula galilei Galile's Cave Harvestman G1 CA
• Banksula grahami G2G3 CA
• Banksula grubbsi Grubbs' Cave Harvestman G1 CA
• Banksula martinorum Martins' Cave Harvestman G1 CA
• Banksula melones Melones Cave Harvestman G1 CA
• Banksula rudolphi Rudolph's Cave Harvestman G1 CA
• Banksula tuolumne Tuolumne Cave Harvestman G2 CA
• Banksula tutankhamen King Tut Cave Harvestman G1 CA
• Basacallis tarachodes
• Basilia boardmani
• Bathynella fraterna CA
• Bathynella germanitas CA
• Bathynella riparia CO
• Bathyphantes alboventris
• Bathyphantes nigrinus
• Bathyphantes pallidus
• Bathyphantes reprobus
• Bathyphantes weyeri Wide Shield Sheetweaver G4 AR, CO, IN, KY, ME, OH, ON, PA, QC, VA, WI, WV
• Batriasymmodes greeveri G1G2 TN
• Batriasymmodes monstrosus
• Batriasymmodes parki GH WV
• Batriasymmodes quisnamus G3 KY, TN
• Batriasymmodes spelaeus G3G4 AL, GA, TN
• Batriasymmodes troglodytes G1G2 AL
• Batrisodes barri G1G2 TN
• Batrisodes cavernosus G1 AL
• Batrisodes clypeospecus G1G2 TN
• Batrisodes cryptotexanus Coffin Cave Mold Beetle G2 TX
• Batrisodes denticollis
• Batrisodes dentifrons G1G2 TX
• Batrisodes fanti G1G2 TX
• Batrisodes feminiclypeus G1G2 TX
• Batrisodes ferulifer G1 TN
• Batrisodes gemmoides G1 TN
• Batrisodes gemmus G1 TN
• Batrisodes gravesi G3 TX
• Batrisodes grubbsi G1G2 TX
• Batrisodes henroti G2G3 KY
• Batrisodes hubrichti G1 KY
• Batrisodes incispes G1 TX
• Batrisodes jocuvestus G1 AL
• Batrisodes jonesi G2G3 AL
• Batrisodes krekeleri IN
• Batrisodes lineaticollis
• Batrisodes pannosus G1 TN
• Batrisodes pekinsi G1 TX
• Batrisodes profundus G1G2 AL
• Batrisodes reyesi G2G3 TX
• Batrisodes rossi
• Batrisodes schmitti
• Batrisodes shadeae G1 TX
• Batrisodes specus G3G4 AL, TN, TX
• Batrisodes subterraneus G1 AL
• Batrisodes texanus Inner Space Cavern Mold Beetle G1G2 TX
• Batrisodes tumoris G1 AL
• Batrisodes valentinei G2G4 AL, TN
• Batrisodes venyivi Helotes Cave Mold Beetle G1 TX
• Batrisodes wartoni G1G2 TX
• Belba bulbipedata G1 KY
• Bembidion affine
• Bembidion lacunarium
• Bembidion nigripes
• Bembidion texanum
• Bertkauia crosbyana
• Bibio xanthopus
• Bicornucandona fineganensis GNR TX
• Bishopella jonesi G1 AL
• Bishopella laciniosa
• Bishopella marianna
• Bittacomorpha clavipes
• Blaberus giganteus
• Blackburnia aaae G1G2 HI
• Blackburnia howarthi G1G2 HI
• Blancosoma scaturgo G1G2 CO
• Blaniulus guttulatus
• Bleptina caradrinalis
• Boisea trivittata
• Bolitophila cinerea
• Bolitophila hybrida
• Bolitophila perlata
• Bosmina longirostris
• Bowmanasellus sequoiae Sequoia Cave Isopod G2 CA
• Brachinus fumans
• Brachycybe lecontii
• Brachycybe petasata
• Brachycybe producta
• Brachydesmus superus
• Brackenridgia ashleyi Ashley's Terrestrial Cave Isopod G1G3 AR, MO
• Brackenridgia cavernarum G3G4 NM, TX
• Brackenridgia reddelli G2G3 TX
• Bradycellus rupestris
• Bradysia forficulata
• Brathinus nitidus
• Bremia caricis
• Bryocamptus morrisoni Morrison's Cave Copepod G3G4 IN, KY, MD
• Bryocamptus newyorkensis
• Bryocamptus nivalis
• Caconemobius albus HI
• Caconemobius howarthi Howarth's Cave Cricket G1G2 HI
• Caconemobius paralbus HI
• Caconemobius uuku HI
• Caconemobius varius Kuamana Cave Cricket G1G2 HI
• Caecidotea acuticarpa G2G3 KS, OK
• Caecidotea adenta G1G2 OK
• Caecidotea alabamensis G3G4 AL, IL, IN, KY, TN
• Caecidotea alleghenyensis Allegheny Spring Isopod G1G2 MD
• Caecidotea ancyla G3G4 AR, MO, OK
• Caecidotea antricola G5 AR, IL, KY, MO, OH, OK
• Caecidotea barri Clifton Cave Isopod G1 KY
• Caecidotea beattyi Beatty's Groundwater Isopod G3G4 IL, IN, MO
• Caecidotea bicrenata Two-toothed Cave Isopod G5 AL, IL, KY, TN
• Caecidotea bilineata G2G3 TX
• Caecidotea cannula Cannulate Cave Isopod G1 WV
• Caecidotea carolinensis Bennett's Mill Cave Isopod G2G3 NC, SC
• Caecidotea catachaetus AL, GA, TN
• Caecidotea circulus G1G2 TN
• Caecidotea cumberlandensis Cumberland Gap Cave Isopod G1G2 VA
• Caecidotea cyrtorhynchus G1 GA
• Caecidotea dauphina AL
• Caecidotea dimorpha G2G3 AR, IN, MO
• Caecidotea dunlaporum Dunlap's Groundwater Isopod GNR IN
• Caecidotea extensolinguala MO
• Caecidotea filicispeluncae Fern Cave Isopod G1 OH
• Caecidotea fisherorum GNR VA
• Caecidotea fonticulus GNR AR
• Caecidotea franzi Franz's Cave Isopod G2G4 KY, MD, PA, WV
• Caecidotea fustis Fustis Cave Isopod G3 MO
• Caecidotea hobbsi Florida Cave Isopod G1G2 FL, GA, VA
• Caecidotea insula Kindt's Cave Isopod G1 OH
• Caecidotea jordani Jordan's Cave Isopod G2G3 IN
• Caecidotea kendeighi Kendeigh's Groundwater Isopod G5 IA, IL, IN, MO, OH
• Caecidotea lesliei G1G2 IL, MO
• Caecidotea mackini GNR OK
• Caecidotea macropropoda Bat Cave Isopod G3 AR, OK
• Caecidotea metcalfi G1G2 KS
• Caecidotea nickajackensis Nickajack Cave Isopod G1 AL, AR, GA, KY, MO, TN, VA
• Caecidotea nordeni Norden's Groundwater Isopod GH MD
• Caecidotea nortoni Norton's Cave Isopod G2G3 TN
• Caecidotea ornatus G1 VA
• Caecidotea packardi G2G4 IL, KY, MO
• Caecidotea paurotrigona G1G2 LA, MS
• Caecidotea putea American Waterslaters G1G3 FL, GA
• Caecidotea recurvata Southwest Virginia Cave Isopod G5 TN, VA
• Caecidotea reddelli G3G4 TX
• Caecidotea richardsonae Tennessee Valley Cave Isopod G5 AL, GA, TN, VA
• Caecidotea rotunda Frost Cave Isopod G2G4 IN, OH
• Caecidotea salemensis Salem Cave Isopod G4 AR, MO
• Caecidotea scyphus G1G2 TN, WV
• Caecidotea serrata Serrated Cave Isopod G1G2 MO
• Caecidotea simonini G1 WV
• Caecidotea simulator G2G3 AR, KS, OK
• Caecidotea sinuncus G1 WV
• Caecidotea spatulata G3G4 IL, MO, VA
• Caecidotea steevesi Steeves' Cave Isopod G3G4 AR, KS, MO, OK
• Caecidotea stiladactyla Slender-fingered Cave Isopod G3G4 AR, MO, OK
• Caecidotea stygia Stygian Cave Isopod G5 IL, IN, KY, MO, MS, OH, TN, VA
• Caecidotea teresae GX IN
• Caecidotea tridentata G1G2 AR, IL, KS, MO, OK
• Calasellus californicus G2 CA, OR
• Calasellus longus G1 CA
• Calathaemon holthuisi Purgatory Cave Shrimp G1G2 TX
• Calathus opaculus
• Calicina cloughensis Clough Cave Harvestman G1 CA
• Califobathynella noodti CA
• Califobathynella teucherti CA
• Californibathynella californica CA
• Calileptoneta briggsi Briggs' Cave Spider G1 CA
• Callinectes sapidus
• Calliphora terraenovae
• Calliphora vicina
• Calliphora vomitoria
• Callobius bennetti
• Caloptilia alnivorella
• Calymmaria persica
• Calymmaria virginica
• Cambala annulata
• Cambala hubrichti
• Cambala minor
• Cambala ochra
• Cambala reddelli
• Cambala speobia G4 Mexico, TX
• Cambarus aculabrum Benton County Cave Crayfish G1 AR, MO
• Cambarus bartonii
• Cambarus cryptodytes Dougherty Plain Cave Crayfish G2G3 FL, GA
• Cambarus hamulatus Prickly Cave Crayfish G3G4 AL, KY, TN
• Cambarus hubbsi
• Cambarus hubrichti Salem Cave Crayfish G4 MO
• Cambarus jonesi Alabama Cave Crayfish G2 AL
• Cambarus laconensis Lacon Exit Cave Crayfish G1 AL
• Cambarus latimanus
• Cambarus nerterius Greenbrier Cave Crayfish G1 WV
• Cambarus parvoculus
• Cambarus pecki Phantom Cave Crayfish G1G2 AL
• Cambarus setosus Bristly Cave Crayfish G3 AR, MO, OK
• Cambarus sheltae Shelta Cave Crayfish G1 AL
• Cambarus speleocoopi Sweet Home Alabama Cave Crayfish G1 AL
• Cambarus striatus
• Cambarus subterraneus Delaware County Cave Crayfish G1 KY, OK
• Cambarus tartarus Oklahoma Cave Crayfish G1 OK
• Cambarus tenebrosus
• Cambarus veitchorum White Spring Cave Crayfish G1 AL
• Cambarus zophonastes Hell Creek Cave Crayfish G1 AR
• Camponotus sayi
• Canthocamptus cavernarum
• Canthon imitator
• Carcinophora americana
• Carebara urichi
• Carnarimelita janstocki HI
• Cartodere constricta
• Catopocerus alabamae GNR AL
• Catopocerus appalachianus
• Catopocerus jonesi GNR AL
• Catops gratiosus
• Cauloxenus stygius Northern Cavefish Copepod G1G2 IN, KY
• Causeyella causeyae AR
• Causeyella dendropus Causeyella Cave Millipede G3 AR, MO
• Causeyella youngsteadtorum AR
• Cavaticovelia aaa G1G2 HI
• Cavernicola pilosa
• Centromerus cornupalpis
• Centromerus denticulatus
• Centromerus latidens
• Centromerus tennapex
• Ceraticelus fissiceps
• Ceraticelus minutus
• Ceratophysella boletivora
• Ceratophysella brevis
• Ceratophysella denticulata
• Ceratophysella engadinensis
• Ceratophysella lucifuga Wyandotte Cave Springtail GNR IL, IN
• Ceratozetes gracilis
• Cerobasis guestfalica
• Ceuthophilus brevipes
• Ceuthophilus carlsbadensis
• Ceuthophilus conicaudus
• Ceuthophilus elegans
• Ceuthophilus ensifer
• Ceuthophilus gracilipes
• Ceuthophilus isletae
• Ceuthophilus latens
• Ceuthophilus latibuli
• Ceuthophilus longipes
• Ceuthophilus maculatus
• Ceuthophilus pallidipes
• Ceuthophilus palmeri
• Ceuthophilus seclusus
• Ceuthophilus stygius
• Ceuthophilus virgatipes
• Ceuthophilus williamsoni
• Chaetaspis aleyorum Aley's Cave Milliped G1 MO
• Chaetaspis attenuatus AR
• Chaetaspis debilis TN
• Chaetaspis fragilis GNR KY
• Chaetaspis mollis G1 AL, TN
• Chaoborus albatus
• Chauliodes pectinicornis
• Cheiracanthium inclusum
• Cheiridium reyesi G1G2 TX
• Cherokia georgiana
• Cheumatopsyche minuscula
• Chinquipellobunus madlae G4 TX
• Chinquipellobunus russelli G2G3 TX
• Chionea scita
• Chironomus decorus
• Chironomus plumosus
• Chiroptonyssus robustipes
• Chitrella archeri G1G2 TN
• Chitrella cavicola
• Chitrella elliotti G1G2 TX
• Chitrella major G1G2 TX
• Chitrella regina Royal Syarinid Pseudoscorpion G1 WV
• Chitrella superba G1 VA
• Chitrella welbourni G1G2 NM
• Chitrellina chiricahuae G1G2 AZ
• Chlaenius aestivus
• Chlamydotheca texasiensis
• Choctella cumminsi
• Chrysops univittatus
• Chthonius cryptus
• Chthonius paludis
• Cicurina arcata
• Cicurina arcuata
• Cicurina bandera G2G3 TX
• Cicurina bandida Bandit Cave Meshweaver G2 TX
• Cicurina baronia Robber Baron Cave Meshweaver G1 TX
• Cicurina barri G1G2 TX
• Cicurina breviaria
• Cicurina brevis
• Cicurina browni G1G2 TX
• Cicurina brunsi TX
• Cicurina bullis TX
• Cicurina buwata G1G2 TX
• Cicurina caliga GNR TX
• Cicurina cavealis
• Cicurina caverna G1G2 TX
• Cicurina coryelli G1G2 TX
• Cicurina delrio TX
• Cicurina ezelli G1G2 TX
• Cicurina gruta G1G2 TX
• Cicurina holsingeri G1G2 TX
• Cicurina hoodensis GNR TX
• Cicurina joya TX
• Cicurina loftini TX
• Cicurina machete G1G2 TX
• Cicurina madla Madla Cave Meshweaver G1 TX
• Cicurina mckenziei G1G2 TX
• Cicurina medina G1G2 TX
• Cicurina menardia G1G2 TX
• Cicurina minima
• Cicurina mirifica TX
• Cicurina mixmaster GNR TX
• Cicurina neovespera TX
• Cicurina obscura G1G2 TX
• Cicurina orellia G1G2 TX
• Cicurina pablo G1G2 TX
• Cicurina pallida
• Cicurina pastura G1G2 TX
• Cicurina patei G1G2 TX
• Cicurina placida
• Cicurina platypus TX
• Cicurina porteri G1G2 TX
• Cicurina puentecilla G1G2 TX
• Cicurina rainesi G1G2 TX
• Cicurina reclusa G1G2 TX
• Cicurina reddelli G1G2 TX
• Cicurina russelli G1G2 TX
• Cicurina sansaba G1G2 TX
• Cicurina selecta G1G2 TX
• Cicurina serena G1G2 TX
• Cicurina sheari G1G2 TX
• Cicurina sprousei G1G2 TX
• Cicurina stowersi G1G2 TX
• Cicurina suttoni G1G2 TX
• Cicurina travisae G1G2 TX
• Cicurina troglobia GNR TX
• Cicurina ubicki G1G2 TX
• Cicurina uvalde G1G2 TX
• Cicurina varians
• Cicurina venefica G1G2 TX
• Cicurina vespera Government Canyon Bat Cave Meshweaver G1 TX
• Cicurina vibora G1G2 TX
• Cicurina wartoni Warton Cave Meshweaver G1 TX
• Cicurina watersi G1G2 TX
• Cicurina wiltoni G1 AL
• Cirolanides texensis G4 Mexico, TX
• Cirolanides wassenichae TX
• Cladura flavoferruginea
• Cleidogona baroqua
• Cleidogona crucis
• Cleidogona crystallina
• Cleidogona hoffmani
• Cleidogona mayapec
• Cleidogona pecki
• Cleidogona unita
• Climacia areolaris
• Cnephia mutata
• Coecobrya kukae G1G2 HI
• Coecobrya lua G1G2 HI
• Coecobrya nupa G1G2 HI
• Coecobrya tenebricosa
• Colliuris pennsylvanicus
• Coloradesmus aquiliensis G1G2 CO
• Coloradesmus beckleyi CO
• Coloradesmus hopkinsae CO
• Coloradesmus manitou CO
• Coloradesmus warneri CO
• Columbasellus acheron WA
• Colusa illecta
• Comalcandona gibsoni Gibson's Groundwater Ostracod TX
• Comalcandona mixoni TX
• Comalcandona tressleri TX
• Comaldessus stygius Comal Springs Diving Beetle G1 TX
• Conasellus brevicaudus
• Conasellus burkensis GNR VA
• Conasellus communis
• Conasellus forbesi
• Conasellus intermedius
• Conasellus jeffersoni VA
• Conasellus kenki G3 DC, MD, PA, VA
• Conasellus laticaudatus
• Conasellus phreaticus G2G3 VA
• Conasellus pricei Price's Cave Isopod G5 MD, PA, VA, WV
• Conasellus racovitzai
• Conasellus scrupulosus
• Conasellus washingtoni DC
• Condeicampa langei GNR TN
• Conicera similis
• Conosoma velocipes
• Conotyla blakei
• Conotyla bollmani Bollman's Cave Millipede G3 IN
• Conotyla vista GH WV
• Copestylum vesicularium
• Coquillettidia perturbans
• Coras juvenilis
• Coras lamellosus
• Coras taugynus
• Corydalus cornutus
• Corynoptera subtrivalis
• Crangonyx anomalus
• Crangonyx antennatus Appalachian Valley crangonyctid G5 AL, GA, TN, VA
• Crangonyx baculispina
• Crangonyx barri Barr's Cave Amphipod G5 IN, KY
• Crangonyx bousfieldi
• Crangonyx caecus G1 KY
• Crangonyx castellanum G1 KY
• Crangonyx consimilis
• Crangonyx cooperi
• Crangonyx dearolfi Pennsylvania Cave Amphipod G2 MD, PA
• Crangonyx floridanus
• Crangonyx floridensis
• Crangonyx forbesi
• Crangonyx gracilis
• Crangonyx grandimanus Florida Cave Amphipod G2G3 FL
• Crangonyx hobbsi Hobb's Cave Amphipod G2G3 FL
• Crangonyx indianensis Indiana Cave Amphipod G3 IN
• Crangonyx insolitus
• Crangonyx lewisi Lewis' Cave Amphipod G2 IN, KY
• Crangonyx longidactylus
• Crangonyx manubrium Jackson County Cave Amphipod G1G2 FL
• Crangonyx minor
• Crangonyx montanus
• Crangonyx obliquus
• Crangonyx ohioensis Ohio Cave Amphipod G1G2 IN, KY, OH
• Crangonyx packardi Packard's Cave Amphipod G4 IL, IN, KS, KY, MO
• Crangonyx palustris
• Crangonyx parhobbsi Florida Big Bend Cave Amphipod G1G2 FL, GA
• Crangonyx pseudogracilis
• Crangonyx richmondensis
• Crangonyx rivularis
• Crangonyx setodactylus
• Crangonyx shoemakeri
• Crangonyx specus G1 KY
• Crangonyx sulphurium Sulphurous Cave Amphipod G1 FL
• Creaserinus fodiens
• Creophilus maxillosus
• Crosbycus goodnighti
• Crosbyella distincta G1G2 AR
• Crosbyella roeweri G1G2 AR
• Crosbyella spinturnix
• Cryptachaea porteri
• Cryptachaea rupicola
• Cryptocreagris destica CO
• Cryptocreagris steinmanni CO
• Cryptophagus valens
• Ctenophthalmus pseudagyrtes
• Ctenus captiosus
• Ctenus hybernalis
• Culex erraticus
• Culex pipiens
• Culex restuans
• Culex territans
• Culicoides paraensis
• Culiseta impatiens
• Cybaeopsis pantopla
• Cybaeopsis tibialis
• Cybaeus giganteus
• Cybaeus patritus
• Cyclocosmia truncata
• Cyclocypris sharpei
• Cyclops cavernarum GNR TX
• Cyclops learii TX
• Cyclosa conica
• Cyclotrachelus fucatus
• Cyclotrachelus sodalis
• Cylindrodesmus hirsutus
• Cylindroiulus arborum
• Cylisticus convexus
• Cyllopsis gemma
• Cyphoderus inaequalis
• Cyphoderus similis
• Cypria lacrima GNR TX
• Cypridopsis vidua
• Cyrtodesmus archimedes
• Dactylocythere arcuata
• Dactylocythere prionata
• Dactylocythere steevesi
• Dactylocythere ungulata
• Dactylolabis hudsonica
• Dactylolabis montana
• Dactylolabis supernumaria
• Darlingtonea kentuckensis G3G4 KY, TN
• Darwinula stevensoni
• Dasycerus nikwasi
• Dermacentor variabilis
• Derops divalis
• Desoria trispinata
• Desoria truncata
• Desoria violacea
• Deuteraphorura jana
• Diacyclops alabamensis AL
• Diacyclops bicuspidatus
• Diacyclops chrisae GA, IN, MD
• Diacyclops clandestinus
• Diacyclops conversus Blue River Groundwater Copepod G2 IN
• Diacyclops crassicaudis
• Diacyclops indianensis Indiana Groundwater Copepod G2 IN, TN
• Diacyclops jeanneli G1G2 IN, NC
• Diacyclops lewisi Lewis' Groundwater Copepod G1 IN
• Diacyclops navus
• Diacyclops nearcticus
• Diacyclops nikolasarburni NM
• Diacyclops salisae Salisa's Groundwater Copepod G1 IN
• Diacyclops sororum
• Diacyclops yeatmani Yeatman's Groundwater Copepod G2G3 IL, IN, MO, OK, TN
• Dicranomyia humidicola
• Dicranomyia stulta
• Dicranota flaveola
• Dicrotendipes neomodestus
• Dineutus assimilis
• Dinocheirus astutus
• Dinocheirus cavicola G2G3 TX
• Diplectrona marianae
• Discourella dubiosa
• Dissochaetus oblitus
• Docosia paradichroa
• Dohrniphora perplexa
• Dolichopeza dorsalis
• Dolichopeza tridenticulata
• Dolichopeza venosa
• Dolichopeza walleyi
• Dolichopus fulvipes
• Dolichopus penicillatus
• Dolomedes scriptus
• Dolomedes tenebrosus
• Dolomedes vittatus
• Donnaldsoncythere hiwasseensis
• Donnaldsoncythere tuberosa
• Dorypteryx domestica
• Drosophila funebris
• Dryobius sexnotatus
• Dryomyza anilis
• Duvalius jureceki
• Duvalius lombardii
• Eidmannella bullata G1G2 TX
• Eidmannella delicata G1G2 TX
• Eidmannella nasuta G1G2 TX
• Eidmannella pallida
• Eidmannella reclusa G1G2 TX
• Eidmannella rostrata G4 TX
• Eidmannella tuckeri GNR TX
• Elaphoidella bidens
• Elaphropus ferrugineus
• Elaphropus incurvus
• Elaver excepta
• Eleodes eschscholtzii
• Eleodes microps CA
• Elliotta howarthi G1G2 WA
• Embaphion contractum
• Embaphion contusum
• Emblyna florens
• Empherozoster antaeus
• Emplenota lucifuga
• Enoplognatha ovata
• Entocythere redelli
• Entomobrya bicolor
• Entomobrya confusa
• Entomobrya griseolivata
• Entomobrya intermedia
• Entomobrya nivalis
• Entomobrya troglodytes G2G3 CO, SD
• Entomobryoides purpurascens
• Ephemera simulans
• Ephippiochthonius tetrachelatus
• Ephippiochthonius virginicus
• Epicharis rustica
• Epitedia cavernicola
• Epitedia wenmanni
• Erebomaster flavescens
• Ereboporus naturaconservatus Nature Conservancy Diving Beetle GNR TX
• Ergodesmus remingtoni G3 IL
• Erichsonius nanus
• Erichsonius patella
• Erigone autumnalis
• Erigone infernalis
• Erigone stygius G1G2 HI
• Ethopolys bipunctatus
• Euborellia annulipes
• Euborellia antoni
• Eucyclops agilis
• Eucyclops bondi
• Eucyclops elegans
• Eucyclops speratus
• Euhadenoecus fragilis
• Euhadenoecus insolitus
• Euhadenoecus puteanus
• Eupeodes volucris
• Euryurus erythropygos
• Euryurus evides
• Euryurus leachii
• Euschoengastia pipistrelli
• Euschoengastia staffordi
• Eustala anastera
• Eustilicus condei
• Eutrichota affinis
• Eutrichota lipsia
• Eutrombicula alfreddugesi
• Exechia attrita
• Exechia auxiliaria
• Exechia bifurcata
• Exechia obediens
• Exechia shawi
• Exechia umbratica
• Exechiopsis nugax
• Faiditus cancellatus
• Faxonius neglectus
• Faxonius rusticus
• Faxonius stygocaneyi Caney Mountain Cave Crayfish G1 MO
• Faxonius validus
• Faxonius virilis
• Feralia jocosa
• Fissilicreagris imperialis Empire Cave Pseudoscorpion G1 CA
• Flabellorhagidia pecki G1G2 ID
• Folsomia bisetosa
• Folsomia candida
• Folsomia elongata
• Folsomia fimetaria
• Folsomia nivalis
• Folsomia penicula
• Folsomia prima
• Folsomia stella
• Folsomia variabilis
• Folsomides americanus
• Forcipomyia pholetor HI
• Foveacheles auricularia CA
• Foveacheles goffi G1G2 HI
• Foveacheles tenorioae G1G2 HI
• Foveacheles titanica G2G3 CA
• Foveacheles tuktoyaktukensis
• Friesea claviseta
• Gabrius microphthalmus
• Gaeolaelaps queenslandicus
• Galerita bicolor
• Galerita lecontei
• Galumna alata G1G2 KY
• Gammarus acherondytes Illinois Cave Amphipod G2G3 IL
• Gammarus cohabitus G1G2 PA
• Gammarus limnaeus
• Gammarus minus
• Gammarus minus tenuipes VA, WV
• Gammarus pseudolimnaeus
• Gammarus troglophilus
• Gastrellarius honestus
• Gaucelmus augustinus
• Gaucelmus cavernicola
• Gaucelmus strinatii
• Gaucelmus tropicus
• Gennadota puberula
• Geocolus caecus
• Geodromicus brunneus
• Glacicavicola bathyscioides G3 ID, WY
• Globocreagris nigrescens
• Gnathonaroides pedalis
• Gnophomyia tristissima
• Grandidierella palama HI
• Gymnophora luteiventris
• Hadenoecus barri
• Hadenoecus cumberlandicus
• Hadenoecus jonesi
• Hadenoecus opilionoides
• Hadenoecus subterraneus
• Haideoporus texanus Edwards Aquifer Diving Beetle G1G2 TX
• Halocaridina palahemo G1 HI
• Halocaridina rubra G3 HI
• Hamohalacarus subterraneus Donaldson's Cave Water Mite G1 IN
• Haplophthalmus danicus
• Harpalus pennsylvanicus
• Hawaiioscia micropthalma G1G2 HI
• Hawaiioscia paeninsulae G1G2 HI
• Hawaiioscia parvituberculata G1G2 HI
• Hawaiioscia rotundata G1G2 HI
• Hawinella lava G2G3 HI
• Heleomyza brachypterna
• Heleomyza serrata
• Helius flavipes
• Heminothrus targionii
• Hemiscolopendra marginata
• Hemisotoma thermophila
• Hentziectypus globosus
• Hesperochernes bradybaughi GNR AZ
• Hesperochernes holsingeri Holsinger's Cave Pseudoscorpion G1 IN
• Hesperochernes mirabilis Southeastern Cave Pseudoscorpion G5 AL, GA, IL, IN, KY, OH, TN, VA
• Hesperochernes occidentalis Guano Pseudoscorpion G5 AR, MO, OK, TX
• Hesperonemastoma inops G1G2 KY
• Hesperonemastoma pallidimaculosum G3 AL
• Hesperonemastoma smilax GNR WV
• Heteraphorura subtenuis
• Heterelmis comalensis
• Heteromurus nitidus
• Hexabathynella hessleri CA
• Hexabathynella muliebris CA
• Hexabathynella otayana CA
• Hexabathynella virginiae VA
• Hibana gracilis
• Hickmania troglodytes
• Hobbsinella edwardensis GNR TX
• Hobbsinella gunnisonensis CO
• Hogna frondicola
• Holsingerius samacos G1G2 TX
• Homaeotarsus bicolor
• Homaeotarsus carolinus
• Homidia socia
• Horologion hubbardi GNR VA
• Horologion speokites Arbuckle Cave Beetle GH WV
• Horreolanus orphanus IL, OH
• Howaia mogera
• Hubbardia shoshonensis Shoshone Cave Whipscorpion G1 CA
• Hyalella azteca
• Hyalella cretae GNR NV
• Hygrotus sayi
• Hypena scabra
• Hypoaspis angusta
• Hypochilus bonneti
• Hypochilus coylei
• Hypochilus gertschi
• Hypochilus pococki
• Hypochilus thorelli
• Hypogastrura antra
• Hypogastrura assimilis
• Hypogastrura matura
• Hypogastrura notha
• Hypogastrura purpurescens
• Hypogastrura sparta
• Hypogastrura tullbergi
• Idagona jasperi UT
• Idagona lehmanensis NV
• Idagona westcotti Idaho Lave Tube Millipede G1G2 ID
• Illacme tobini CA
• Iolania frankanstonei HI
• Islandiana cavealis Cave Sheet-web Spider GNR IN
• Islandiana flaveola
• Islandiana lewisi cave sheet-web spider G1 IN
• Islandiana muma G1G2 AL, IL, VA
• Islandiana princeps
• Islandiana speophila Cavern Sheet-web Spider G1 WV
• Islandiana unicornis G2G3 IL, OK, TX
• Isotoma andrei
• Isotoma gelida
• Isotoma tariva
• Isotoma trispinata
• Isotoma viridis
• Isotomiella minor
• Ixodes conepati
• Ixodes cookei
• Ixodes scapularis
• Ixodes woodi
• Jalysus wickhami
• Karschomyia viburni
• Kleptochthonius affinis G1G2 TN
• Kleptochthonius anophthalmus G1 VA
• Kleptochthonius attenuatus G1 KY
• Kleptochthonius barri G1G2 TN
• Kleptochthonius binoculatus G1G2 VA
• Kleptochthonius cerberus G1 KY
• Kleptochthonius charon G1G2 TN
• Kleptochthonius daemonius G1G2 TN
• Kleptochthonius erebicus G1 KY
• Kleptochthonius gertschi Gertsch's Cave Pseudoscorpion G1 VA
• Kleptochthonius griseomanus Gray-handed Cave Pseudoscorpion G2 IN
• Kleptochthonius hageni G1G2 KY
• Kleptochthonius henroti Greenbrier Valley Cave Pseudoscorpion G2 WV
• Kleptochthonius hetricki Organ Cave Pseudoscorpion G1 WV
• Kleptochthonius hubrichti G1G2 KY
• Kleptochthonius infernalis G1 TN
• Kleptochthonius krekeleri G2G4 KY
• Kleptochthonius lewisorum Lewis Cave Pseudoscorpion G1 IN
• Kleptochthonius lutzi Lutz's Cave Pseudoscorpion G1 VA
• Kleptochthonius magnus G1 GA, TN
• Kleptochthonius microphthalmus G1G2 KY
• Kleptochthonius multispinosus
• Kleptochthonius myopius G1 TN
• Kleptochthonius orpheus Orpheus Cave Pseudoscorpion G1 WV
• Kleptochthonius packardi Packard's Cave Pseudoscorpion G2 IN, KY
• Kleptochthonius pluto G1 TN
• Kleptochthonius proserpinae Proserpina Cave Pseudoscorpion G1 WV
• Kleptochthonius proximosetus G1 VA
• Kleptochthonius regulus G1G2 VA
• Kleptochthonius rex G1 TN
• Kleptochthonius similis G1 VA
• Kleptochthonius stygius G1 TN
• Kleptochthonius tantalus G1 TN
• Labidostomma neotropica
• Laccophilus maculosus
• Lacrimacandona wisei GNR TX
• Lacunicambarus diogenes
• Laelaps cavernicola KY
• Larca aalbui Aalbu's Cave Pseudoscorpion G1 CA
• Larca cavicola Grand Canyon Cave Pseudoscorpion G1G2 AZ
• Larca guadalupensis Guadalupe Cave Pseudoscorpion G1G2 TX
• Larca laceyi Lacey's Cave Pseudoscorpion G1 CA
• Larca welbourni G1G2 AZ
• Lascoria ambigualis
• Latrodectus variolus
• Lebia ornata
• Leia cuneola
• Leiobunum aldrichi
• Leiobunum bicolor
• Leiobunum calcar
• Leiobunum longipes
• Leiobunum nigripes
• Leiobunum politum
• Leiobunum townsendii
• Leiobunum vittatum
• Lepidocyrtus atropurpureus
• Lepidocyrtus helenae
• Lepidocyrtus paradoxus
• Lepidocyrtus usitatus
• Lepthyphantes leprosus
• Leptocera atra
• Leptocera caenosa
• Leptopeza compta
• Leptotrombidium myotis
• Lesteva cribratula
• Lesteva pallipes
• Lestodiplosis grassator
• Lestodiplosis satiata
• Lethemurus missus Missus Cave Springtail G4 CO, IL, IN, KY, MO, Mexico, TN
• Leucauge venusta
• Leucohya heteropoda
• Leucohya texana G1G2 TX
• Leydigia leydigi
• Liagoceradocus lonomaka G1G2 HI
• Liancalus genualis
• Ligidium elrodii
• Ligidium kofoidi G1G2 CA
• Limomyza cavernicola
• Limonia annulata
• Limonia badia
• Limonia indigena
• Limonia maculicosta
• Limonia stulta
• Linopodes mammouthia KS, KY
• Liocranoides archeri Archer's Two-clawed Cave Spider G2 AL, TN
• Liocranoides coylei
• Liocranoides tennesseensis
• Liocranoides unicolor GU AL, GA, KY, TN
• Liposcelis decolor
• Liposcelis divinatoria
• Lirceolus bisetus G1G2 TX
• Lirceolus cocytus GNR TX
• Lirceolus hardeni G2G3 TX
• Lirceolus nidulus GNR Mexico, TX
• Lirceolus pilus G2G3 TX
• Lirceolus smithii Texas Troglobitic Water Slater G1G2 TX
• Lirceus bicuspidatus
• Lirceus bidentatus
• Lirceus bisetus VA
• Lirceus culveri Rye Cove Cave Isopod G1 VA
• Lirceus fontanalis
• Lirceus fontinalis
• Lirceus garmani
• Lirceus holsingeri VA
• Lirceus hoppinae
• Lirceus littonensis VA
• Lirceus orndorffi VA
• Lirceus ozarkensis
• Lirceus slayorum
• Lirceus usdagalun Lee County Cave Isopod G1 VA
• Lirceus zigleri GNR VA
• Lissocreagris eurydice G1 AL
• Lissocreagris nickajackensis G1G2 AL, TN
• Lissocreagris persephone G1 AL
• Lissocreagris pluto G1 AL
• Lissocreagris subatlantica
• Lissocreagris valentinei Valentine's Cave Pseudoscorpion G1 VA
• Litargus balteatus
• Lithobius atkinsoni
• Litocampa cookei Cooke's Cave Dipluran G5 AL, GA, KY, TN, VA
• Litocampa fieldingae Fielding's Cave Dipluran G2G3 VA, WV
• Litocampa henroti G1G2 AL
• Litocampa hoffmani G3 VA
• Litocampa jonesi G2G3 KY, TN
• Litocampa pucketti Puckett's Cave Dipluran G1G2 VA
• Litocampa valentinei G5 AL, TN
• Lophomus skamania WA
• Loxosceles panama
• Lustrochernes minor
• Lycosa howarthi G1G2 HI
• Lymantes nadineae GNR TX
• Machilis variabilis
• Macrobrachium carcinus
• Macrocera hirsuta
• Macrocera nobilis
• Macrocheles penicilliger
• Macrocheles robustulus
• Macrocheles stygius G1G2 KY
• Macrocheles troglodytes G1G2 KY
• Macrocyclops albidus
• Macrocyclops fuscus
• Macromastus umpqua G1G2 OR
• Maevia inclemens
• Malaconothrus monodactylus
• Mangora placida
• Manota obscura
• Margarinotus egregius
• Marpissa lineata
• Mastigoproctus giganteus
• Maymena ambita
• Mecyclothorax aa HI
• Mecynogea lemniscata
• Megacyclops donnaldsoni Donaldson's Cave Copepod G3G4 GA, IN, KY, TN
• Megacyclops latipes
• Megacyclops viridis
• Megalothorax minimus
• Megalothorax tristani
• Megaselia breviterga
• Megaselia cavernicola
• Megaselia nigriceps
• Megaselia rufipes
• Megaselia spelunciphila
• Megaselia taylori
• Melanolestes picipes
• Mermessus antraeus
• Mermessus denticulatus
• Mermessus indicabilis
• Mermessus maculatus
• Mermessus tridentatus
• Meropelopia flavifrons
• Mesaphorura iowensis
• Mesaphorura krausbaueri
• Mesaphorura pacifica
• Mesaphorura silvicola
• Mesocyclops edax
• Meta ovalis
• Metajapyx subterraneus
• Metalimnobia cinctipes
• Metaltella simoni
• Metisotoma grandiceps
• Mexichthonius exoticus G1G2 TN
• Mexistenasellus coahuila Coahuila Groundwater Isopod G2G3 Mexico, TX
• Mexistenasellus floridensis Florida Cave Isopod G1 FL
• Mexiweckelia hardeni G2G3 TX
• Microbisium parvulum
• Microcreagris grandis Great Basin Cave Pseudoscorpion G1G2 NV
• Microcyclops rubellus
• Microcylloepus pusillus
• Microvelia americana
• Miktoniscus barri Barr's Terrestrial Cave Isopod G2G4 IN, KY, TN
• Miktoniscus linearis
• Miktoniscus medcofi
• Miktoniscus morganensis
• Miktoniscus oklahomensis Racovitza's Cave Isopod G1G2 OK
• Miktoniscus racovitzai Racovitza's Terrestrial Cave Isopod G3G4 KY, OK, VA
• Mimetus notius
• Mimetus puritanus
• Minicreagris pumila
• Mixojapyx reddelli G3G4 TX
• Mochlonyx cinctipes
• Monopis crocicapitella
• Monopsyllus wagneri
• Montanabathynella pecosensis TX
• Montanabathynella salish GNR MT
• Moraria cristata
• Mundochthonius cavernicola G1G2 IL, MO
• Mundochthonius holsingeri G1 VA
• Musca domestica
• Muscina prolapsa
• Mycetophila analis
• Mycetophila byersi
• Mycetophila fisherae
• Mycetophila ichneumonea
• Mycetophila ruficollis
• Mycetophila sordida
• Mycomya nitida
• Myodopsylla insignis
• Myrmecina americana
• Mystacides sepulchralis
• Nadabius ameles
• Namiotkocypria haysensis TX
• Nampabius mycophor
• Nampabius turbator G1 VA
• Nanhermannia nanus
• Nannopetalum fontis AL
• Nannopetalum vespertilo NC
• Narceus americanus
• Narceus annularis
• Neanura hawaiiensis G1G2 HI
• Neanura muscorum
• Neanura persimilis
• Neanura pseudoquadrioculata
• Neaphaenops tellkampfi G3G4 IN, KY
• Necrophilus pettitii
• Neelides minutus
• Neglecandona neglecta
• Nelima elegans
• Nelima paessleri
• Nelsonites jonesi G2G3 KY
• Nelsonites walteri G3 TN
• Nemadus hornii
• Nemoura trispinosa
• Neoallochernes incertus G1G2 NM
• Neoallochernes stercoreus G4 TX
• Neobisnius paederoides
• Neochthonius imperialis Empire Cave Pseudoscorpion G1 CA
• Neochthonius troglodytes G2G3 CA
• Neolithobius voracior
• Neoporus clypealis
• Neoscona domiciliorum
• Neospintharus trigonum
• Nepalomyia sombrea
• Neriene radiata
• Nesidiolestes ana Ana Wingless Thread Bug G1G2 HI
• Nesticus barri Barr's Cave Spider G3 AL, TN
• Nesticus barrowsi G1G2 TN
• Nesticus brimleyi G1G2 NC
• Nesticus carolinensis
• Nesticus carteri
• Nesticus cressleri GNR GA
• Nesticus dilutus Grassy Creek Cave Spider G1 TN
• Nesticus furtivus Racoon Mountain Caverns Cave Spider G1 TN
• Nesticus georgia Georgia Cave Spider G1G2 GA
• Nesticus gertschi
• Nesticus holsingeri Holsinger's Cave Spider G3G4 VA
• Nesticus jonesi Cave Spring Cave Spider G1 AL
• Nesticus lula GNR GA
• Nesticus mimus
• Nesticus paynei G3G4 TN, VA
• Nesticus pecki Monteagle Cave Spider GNR TN
• Nesticus potterius G1G2 CA
• Nesticus reclusus
• Nesticus sodanus
• Nesticus stupkai
• Nesticus stygius G1G2 TN
• Nesticus tennesseensis Tennessee Cave Spider G3G4 TN, VA, WV
• Neuratelia sayi
• Nevadesmus hubbsi GNR NV
• Nevadesmus ophimontis NV
• Nevadesmus superstitiona AZ
• Niptus arcanus CA
• Nitidotachinus scrutator
• Nitocrellopsis texana GNR TX
• Nopoiulus kochii
• Notiobia terminata
• Novobisium carolinense
• Novobisium ingratum
• Nycteridopsylla chapini
• Oaphantes prometheus CA
• Occasjapyx kofoidi CA
• Ochrotrichia spinosa
• Ocrepeira ectypa
• Odiellus pictus
• Odontotaenius disjunctus
• Oecothea fenestralis
• Oecothea specus
• Oliarus gagneri G1G2 HI
• Oliarus kalaupapae G1G2 HI
• Oliarus lorettae G1G2 HI
• Oliarus makaiki G1G2 HI
• Oliarus polyphemus G1G2 HI
• Oliarus priola G1G2 HI
• Oliarus waikau G1G2 HI
• Omalium rivulare
• Omorgus alatus
• Omorgus amictus
• Omorgus batesi
• Omorgus brucki
• Omorgus carinatus
• Omorgus costatus
• Omorgus fuliginosus
• Omorgus lindemannae
• Omorgus punctatus
• Omorgus rubricans
• Omorgus suberosus
• Oncopodura cruciata G1G2 MT
• Oncopodura fenestra G2G3 TX
• Oncopodura hoffi Hoff's Cave Springtail G1G2 MO
• Oncopodura hubbardi G2 VA
• Oncopodura iowae G3G4 IA, IL, MO
• Oncopodura mala
• Oncopodura prietoi G1G2 Mexico, NM
• Oncopodura subhoffi G3 CO
• Oniscus asellus
• Onychiurus eous
• Onychiurus gelus G2G3 IA, WA, WI
• Onychiurus janus G2G3 AL, VA, WV
• Onychiurus obesus G3G4 IA, MN, MO, WI
• Onychiurus opus
• Onychiurus oregonensis G1G2 OR
• Onychiurus paro G1 AL
• Onychiurus parvicornis
• Onychiurus pipistrellae IL
• Onychiurus pseudoarmatus
• Onychiurus pseudofimetarius
• Onychiurus relcutus
• Onychiurus reluctus GNR IA, IL, Mexico, TN, WV
• Onychiurus similis
• Ophyiulus pilosus
• Opiona catorycha OR
• Opiona graeningi CA
• Oppia nitens
• Orchesella ainsiiei
• Orchesella hexfasciata
• Orchopeas leucopus
• Orchopeas sexdentatus
• Orconectes australis Southern Cave Crayfish G5 AL, KY, TN
• Orconectes barri Cumberland Plateau Cave Crayfish G2 KY, TN
• Orconectes incomptus Tennessee Cave Crayfish G2 TN
• Orconectes inermis Ghost Crayfish G5 IN, KY, TN
• Orconectes packardi Appalachian Cave Crayfish G2 KY, TN
• Orconectes pellucidus Mammoth Cave Crayfish G4 AL, IN, KY, TN
• Oregonasellus elliotti OR
• Oreonetides beattyi Beatty's Sheetweb Cave Spider GNR IN, MD, PA, TN, VA
• Oreonetides vaginatus
• Oreophantes recurvatus
• Orfelia elegans
• Origanates rostratus
• Ormosia affinis
• Ormosia meigenii
• Oropsylla arctomys
• Orthocyclops modestus
• Orus rubens
• Oryzaephilus surinamensis
• Osphranticum labronectum
• Otiorhynchus ovatus
• Otostigmus cooperi
• Oxidus gracilis
• Oxyopes salticus
• Oxytelus exiguus
• Ozarkia alabama GNR AL
• Ozarkia arkansa AR
• Ozarkia blanda GNR AL
• Ozarkia georgia GNR GA
• Ozarkia novaegalleciae NM
• Ozarkia serena G1G2 AL
• Pachydesmus crassicutis
• Pacificabathynella kalispellensis GNR MT
• Pacificabathynella ruthae GNR MT
• Pacificabathynella sequoiae GNR CA, WA
• Pacificabathynella stanfordi GNR MT
• Pacificabathynella yupik AK
• Packardesmus cavicola
• Paeromopus cavicolens
• Paitobius arienus
• Paitobius carolinae
• Paitobius juventus
• Palaemon kadiakensis
• Palaemon paludosus
• Palaemonetes antrorum Balcones Cave Shrimp G2G3 TX
• Palaemonetes cummingi Squirrel Chimney Cave Shrimp GH FL
• Palaemonias alabamae Alabama Cave Shrimp G1 AL
• Palaemonias ganteri Mammoth Cave Shrimp G1 KY
• Paleonura petebellingeri G1 VA
• Pangaeus docilis
• Panstrongylus geniculatus
• Pantelozetes cavaticus
• Parabogidiella americana G2G3 TX
• Paracarpais niveus
• Paracyclops canadensis
• Paracyclops chiltoni
• Paracyclops poppei
• Paragnetina media
• Paraholsingerius smaragdinus GNR TX
• Parametriocnemus lundbeckii
• Paramexiweckelia ruffoi Ruffo's Cave Amphipod G1G2 TX
• Paramoera lokowai G1G2 HI
• Paramoera paakai G1G2 HI
• Paramoera rua G1G2 HI
• Parasitus fimetorum
• Parasitus remberti
• Parasteatoda tepidariorum
• Paratachys aaa HI
• Paratheridula perniciosa
• Paravachonium bolivari
• Parazaona cavicola
• Paria sexnotata
• Parisotoma notabilis
• Parobisium charlotteae G1G2 OR
• Parobisium petilum CA
• Parobisium yosemite CA
• Patrobus longicornis
• Pegoplata infirma
• Pelegrina exigua
• Pelegrina proterva
• Penaeus setiferus
• Pericoma scotiae
• Periplaneta americana
• Perissopalla flagellisetula
• Peromyscopsylla hesperomys
• Phalangodes armata G3G4 IN, KY
• Phanetta subterranea Subterranean Sheetweb Spider G5 AL, AR, GA, IL, IN, KY, MO, NC, OH, TN, VA, WV
• Phaonia soccata
• Phelister fulvulus
• Phelister luculentus
• Phidippus purpuratus
• Philonthus cyanipennis
• Philonthus lomatus
• Phoberus capensis
• Phoberus pusillus
• Phoberus sulcatus
• Pholcus dade
• Pholcus jusahi
• Pholcus lanieri
• Pholcus phalangioides
• Phronia exigua
• Phronia flavipes
• Phronia incerta
• Phronia sp. A
• Phronia sp. B
• Physocyclus enaulus
• Physocypria denticulata
• Physocypria globula
• Pimoa altioculata
• Pinodytes pusio
• Pinodytes rothi
• Pirata alachuus
• Pirata sedentarius
• Piratula insularis
• Pisaurina mira
• Plathemis lydia
• Platynus angustatus
• Platynus cincticollis
• Platynus parmarginatus
• Platynus tenuicollis
• Plumatyla humerosa G2G3 CA
• Plutomurus brevimucronata
• Plutomurus californicus G2G3 CA, Mexico
• Plutomurus grahami G1 NM
• Plutomurus oregonensis
• Pnyxia scabiei
• Poecilochirus carabi
• Poecilophysis extraneostella G2 VA, WV
• Poecilophysis pratensis
• Poecilophysis weyerensis G3 IN, KY, TN, VA, WV
• Pogonognathellus bidentatus
• Pogonognathellus danieli
• Pogonognathellus dubius
• Pogonognathellus flavescens
• Pogonognathellus lamelliferus
• Pogonognathellus nigritus
• Polycentropus barri
• Polycentropus elarus
• Polydesmus inconstans
• Polydesmus moniliaris
• Polydrusus impressifrons
• Polygonia comma
• Polynoncus gemmingeri
• Ponera pennsylvanica
• Porcellio laevis
• Porcellio scaber
• Porcellio spinicornis
• Porrhomma cavernicola Appalachian Cave Spider G5 AL, AR, GA, IA, IL, IN, KY, MD, MO, NC, OK, ON, PA, TN, VA, WV
• Porrhomma egeria
• Porrhomma terrestre
• Potamocypris fulva
• Pratherodesmus despaini CA
• Pratherodesmus ecclesia AZ
• Pratherodesmus voylesi AZ
• Prenolepis imparis
• Primicimex cavernis
• Prionochaeta opaca
• Procambarus acherontis Orlando Cave Crayfish G1 FL
• Procambarus alleni
• Procambarus attiguus Silver Glen Springs Cave Crayfish G1 FL
• Procambarus blandingii
• Procambarus clarkii
• Procambarus cuevachicae
• Procambarus delicatus Bigcheek Cave Crayfish G1 FL
• Procambarus erythrops Santa Fe Cave Crayfish G1 FL
• Procambarus fallax
• Procambarus franzi Orange Lake Cave Crayfish G1 FL
• Procambarus horsti Big Blue Spring Cave Crayfish G1 FL
• Procambarus leitheuseri Coastal Lowland Cave Crayfish G1G2 FL
• Procambarus lucifugus Light-fleeing Cave Crayfish G1G2 FL
• Procambarus milleri Miami Cave Crayfish G1 FL
• Procambarus morrisi Putnum County Cave Crayfish G1 FL
• Procambarus orcinus Woodville Karst Cave Crayfish G1 FL
• Procambarus paeninsulanus
• Procambarus pallidus Pallid Cave Crayfish G1G2 FL, GA
• Procambarus pilosimanus
• Procambarus spiculifer
• Procambarus toltecae
• Procambarus versutus
• Procambarus villalobosi
• Procaris hawaiana G1 HI
• Proceratium micrommatum
• Procladius bellus
• Progomphus obscurus
• Progradungula carraiensis
• Proisotoma frisoni
• Proisotoma minuta
• Proisotoma sepulcralis
• Proisotoma veca
• Proisotoma vesiculata
• Prosimulium mixtum
• Prosimulium saltus
• Protolimnesia ventriplacophora TX
• Psephenus herricki
• Pseudachorutes aureofasciatus
• Pseudachorutes saxatilis
• Pseudachorutes subcrassoides
• Pseudanophthalmus abditus Concealed Cave Beetle G3 KY
• Pseudanophthalmus acherontis Echo Cave Beetle G1 TN
• Pseudanophthalmus alabamae Alabama Cave Beetle G2 AL
• Pseudanophthalmus alladini Alladin's Cave Beetle G3G4 AL
• Pseudanophthalmus assimilis West Wills Valley Cave Beetle G1G2 AL
• Pseudanophthalmus audax Bold Cave Beetle G1G2 KY
• Pseudanophthalmus avernus Avernus Cave Beetle G1 VA
• Pseudanophthalmus barberi G2G3 KY
• Pseudanophthalmus barri G1G2 IN
• Pseudanophthalmus beakleyi Beakley's Cave Beetle G3G4 KY, TN
• Pseudanophthalmus bendermani Benderman's Cave Beetle G1G2 TN
• Pseudanophthalmus caecus Clifton Cave Beetle G1 KY
• Pseudanophthalmus calcareus Limestone Cave Beetle G1 KY
• Pseudanophthalmus catherinae Catherine's Cave Beetle G1 TN
• Pseudanophthalmus catoryctos Lesser Adams Cave Beetle G1 KY
• Pseudanophthalmus cerberus G3G4 KY, TN
• Pseudanophthalmus chthonius G3 IN, KY
• Pseudanophthalmus ciliaris G3G4 KY, TN
• Pseudanophthalmus cnephosus Larue County Cave Beetle G1G2 KY
• Pseudanophthalmus colemanensis Coleman Cave Beetle G1 TN
• Pseudanophthalmus conditus Hidden Cave Beetle G1G2 KY
• Pseudanophthalmus cordicollis Little Kennedy Cave Beetle G1 VA
• Pseudanophthalmus cumberlandus G1G2 TN
• Pseudanophthalmus darlingtoni G3 KY
• Pseudanophthalmus deceptivus Deceptive Cave Beetle G1 VA
• Pseudanophthalmus delicatus Delicate Cave Beetle G3G4 TN, VA
• Pseudanophthalmus desertus G3 KY
• Pseudanophthalmus digitus G1G2 GA, TN
• Pseudanophthalmus distinguens G1G2 AL, VA
• Pseudanophthalmus egberti New River Valley Cave Beetle G1 VA
• Pseudanophthalmus elongatus G1G2 KY
• Pseudanophthalmus emersoni G1 IN
• Pseudanophthalmus englehardti Englehardt's Cave Beetle G1 TN
• Pseudanophthalmus eremita G1G2 IN, KY, OH
• Pseudanophthalmus exiguus G3G4 KY
• Pseudanophthalmus exoticus Exotic Cave Beetle G1 KY
• Pseudanophthalmus farrelli G1G2 TN
• Pseudanophthalmus fastigatus Tapered Cave Beetle G1 GA
• Pseudanophthalmus fluviatilis G3 AL
• Pseudanophthalmus fowlerae Fowler's Cave Beetle G1 TN
• Pseudanophthalmus frigidus Icebox Cave Beetle G1 KY
• Pseudanophthalmus fulleri G2G3 AL, GA, TN
• Pseudanophthalmus fuscus G4 WV
• Pseudanophthalmus georgiae Georgia Cave Beetle G1G2 GA
• Pseudanophthalmus globiceps G1 KY
• Pseudanophthalmus gracilis Clover Hollow Cave Beetle G1G2 VA
• Pseudanophthalmus grandis G4 WV
• Pseudanophthalmus hadenoecus Timber Ridge Cave Beetle G1 WV
• Pseudanophthalmus henroti GNR WV
• Pseudanophthalmus hesperus G1 TN
• Pseudanophthalmus higginbothami G2 WV
• Pseudanophthalmus hirsutus Cumberland Gap Cave Beetle G1G2 TN, VA
• Pseudanophthalmus hoffmani Hoffman's Cave Beetle G2G3 VA
• Pseudanophthalmus holsingeri Holsinger's Cave Beetle G1 VA
• Pseudanophthalmus horni Garman's Cave Beetle G3 KY
• Pseudanophthalmus hortulanus Garden Cave Beetle G1 VA
• Pseudanophthalmus hubbardi Hubbard's Cave Beetle G1 VA
• Pseudanophthalmus hubrichti Hubricht's Cave Beetle G1 VA
• Pseudanophthalmus humeralis G2 TN
• Pseudanophthalmus hypertrichosis G3 WV
• Pseudanophthalmus hypolithos G1 KY
• Pseudanophthalmus illinoisensis Illinois Cave Beetle G1 IL
• Pseudanophthalmus inexpectatus Surprising Cave Beetle G1G2 KY
• Pseudanophthalmus inquisitor Inquirer Cave Beetle G1 TN
• Pseudanophthalmus insularis Baker Station Cave Beetle G1 TN
• Pseudanophthalmus intermedius Intermediate Cave Beetle G2 TN
• Pseudanophthalmus intersectus Crossroads Cave Beetle G1G2 VA
• Pseudanophthalmus jonesi Grassy Cove Cave Beetle G1G2 AL, TN
• Pseudanophthalmus krameri Kramer's Cave Beetle G1 OH
• Pseudanophthalmus krekeleri Rich Mountain Cave Beetle GX WV
• Pseudanophthalmus lallemanti G1 WV
• Pseudanophthalmus leonae G1 IN
• Pseudanophthalmus limicola Maddens Cave Beetle G1G2 VA
• Pseudanophthalmus lodingi G1G2 AL
• Pseudanophthalmus loganensis G2G3 KY, TN
• Pseudanophthalmus longiceps Long-headed Cave Beetle G1G2 TN, VA
• Pseudanophthalmus macradyi Macrady's Cave Beetle G1G2 TN
• Pseudanophthalmus major Beaver Cave Beetle G1 KY
• Pseudanophthalmus menetriesi G3 KY
• Pseudanophthalmus meridionalis G2 AL
• Pseudanophthalmus montanus Dry Fork Valley Cave Beetle G1 WV
• Pseudanophthalmus nelsoni Nelson's Cave Beetle G2 VA
• Pseudanophthalmus nickajackensis Nickajack Cave Beetle G1 AL, TN
• Pseudanophthalmus nortoni Norton's Cave Beetle G1 TN
• Pseudanophthalmus occidentalis Western Cave Beetle G1G2 TN
• Pseudanophthalmus ohioensis Ohio Cave Beetle G1 OH
• Pseudanophthalmus orientalis Surprising Cave Beetle G2G3 KY
• Pseudanophthalmus orthosulcatus G1 WV
• Pseudanophthalmus packardi Packard's Cave Beetle G1G2 KY
• Pseudanophthalmus pallidus Pale Cave Beetle G1G2 TN
• Pseudanophthalmus paradoxus Ridetop Cave Beetle G1 TN
• Pseudanophthalmus parvicollis Hupps Hill Cave Beetle G1 VA
• Pseudanophthalmus parvus Tatum Cave Beetle GH KY
• Pseudanophthalmus paulus Nobletts Cave Beetle G1 TN
• Pseudanophthalmus paynei Payne's Cave Beetle G1 TN
• Pseudanophthalmus petrunkevitchi Petrunkevitch's Cave Beetle G1G2 VA
• Pseudanophthalmus pholeter Greater Adams Cave Beetle G1 KY
• Pseudanophthalmus pilosus G2G3 KY
• Pseudanophthalmus pontis Natural Bridge Cave Beetle G1 VA
• Pseudanophthalmus potamaca South Branch Valley Cave Beetle G3G4 VA, WV
• Pseudanophthalmus praetermissus Overlooked Cave Beetle G1 VA
• Pseudanophthalmus princeps G1G2 KY, TN
• Pseudanophthalmus productus G3G4 TN
• Pseudanophthalmus profundus G2 AL
• Pseudanophthalmus pubescens G3 KY
• Pseudanophthalmus punctatus Spotted Cave Beetle G2 VA
• Pseudanophthalmus pusillus Tiny Cave Beetle G1 TN
• Pseudanophthalmus pusio Ellet Valley Cave Beetle G2G3 VA
• Pseudanophthalmus puteanus Old Well Cave Beetle G1G2 KY
• Pseudanophthalmus quadratus Straley's Cave Beetle G1 VA
• Pseudanophthalmus rittmani G1G2 KY
• Pseudanophthalmus robustus Robust Cave Beetle G3G4 TN
• Pseudanophthalmus rogersae Roger's Cave Beetle G1 KY
• Pseudanophthalmus rotundatus Rotund Cave Beetle G2 TN, VA
• Pseudanophthalmus sanctipauli Saint Paul Cave Beetle G1G2 VA
• Pseudanophthalmus scholasticus Schoolhouse Cave Beetle G1 KY
• Pseudanophthalmus scutilis G1 TN
• Pseudanophthalmus seclusus Rye Cove Cave Beetle G2G3 VA
• Pseudanophthalmus senecae Seneca Cave Beetle G1 WV
• Pseudanophthalmus sequoyah Sequoyah Cave Beetle G1 AL
• Pseudanophthalmus sericus Silken Cave Beetle G1 VA
• Pseudanophthalmus shilohensis Shiloh Cave Beetle G2 IN
• Pseudanophthalmus sidus Meredith Cave Beetle G1 TN
• Pseudanophthalmus simplex Simple Cave Beetle G1G2 TN
• Pseudanophthalmus simulans Cub Run Cave Beetle G1 KY
• Pseudanophthalmus solivagus G1G2 KY
• Pseudanophthalmus steevesi Steeves' Cave Beetle G1G2 AL
• Pseudanophthalmus striatus G2G3 KY
• Pseudanophthalmus stricticollis Marengo Cave Beetle G4 IL, IN
• Pseudanophthalmus sylvaticus
• Pseudanophthalmus templetoni Templeton's Cave Beetle G1 TN
• Pseudanophthalmus tenebrosus Stevens Creek Cave Beetle G1 KY
• Pseudanophthalmus tennesseensis G3 TN
• Pseudanophthalmus tenuis G4 IN
• Pseudanophthalmus thomasi Thomas' Cave Beetle G1G2 VA
• Pseudanophthalmus tiresias Indian Grave Point Cave Beetle G1 TN
• Pseudanophthalmus transfluvialis G1G2 KY
• Pseudanophthalmus troglodytes Louisville Cave Beetle G1 KY
• Pseudanophthalmus tullahoma Duck River Cave Beetle G1G2 TN
• Pseudanophthalmus umbratilis G2G3 KY
• Pseudanophthalmus unionis Union County Cave Beetle G1G2 TN
• Pseudanophthalmus valentinei Valentine's Cave Beetle G3G4 TN
• Pseudanophthalmus vanburenensis G1 TN
• Pseudanophthalmus ventus Blowing Cave Beetle G1 TN
• Pseudanophthalmus vicarius Vicariant Cave Beetle G2G3 VA
• Pseudanophthalmus virginicus Maiden Spring Cave Beetle G1 VA
• Pseudanophthalmus wallacei Wallace's Cave Beetle G1 TN
• Pseudanophthalmus youngi Young's Cave Beetle G3G4 IN
• Pseudobaicalasellus bowmani Natural Bridge Cave Isopod G1 VA
• Pseudobaicalasellus henroti Henrot's Cave Isopod G2 VA
• Pseudobaicalasellus holsingeri Holsinger's Cave Isopod G5 MD, VA, WV
• Pseudobaicalasellus incurvus Incurved Cave Isopod G2G4 TN, VA
• Pseudobaicalasellus magniezi VA
• Pseudobaicalasellus mausi G2 MD, VA
• Pseudobaicalasellus vandeli Vandel's Cave Isopod G3G4 MD, VA
• Pseudocandona albicans
• Pseudocandona jeanneli Jeannel's Cave Ostracod G3 IN, KY, TN
• Pseudocandona marengoensis Marengo Cave Ostracod G1G2 IN
• Pseudocandona semicognita
• Pseudogarypus hypogeus G1G2 AZ
• Pseudogarypus orpheus Music Hall Cave Pseudoscorpion G1 CA
• Pseudogarypus speleus G1G2 CA
• Pseudoleria parvitarsus
• Pseudopolydesmus erasus
• Pseudopolydesmus pinetorum
• Pseudopolydesmus serratus
• Pseudosinella aera
• Pseudosinella alba
• Pseudosinella argentea
• Pseudosinella bona G2 VA
• Pseudosinella boneti
• Pseudosinella certa Gandy Creek Cave Springtail G1 WV
• Pseudosinella christianseni Christiansen's Cave Springtail G5 AL, GA, KY, TN, VA
• Pseudosinella collina
• Pseudosinella dubia G3 AR, Mexico, OK
• Pseudosinella duodecimpunctata
• Pseudosinella erehwon G2 VA
• Pseudosinella espana Espana Cave Springtail G3 MO, Mexico, TN
• Pseudosinella espanita G1 KY, TN
• Pseudosinella extra G1G2 VA
• Pseudosinella flatua G1G2 NC, VA
• Pseudosinella folsomi
• Pseudosinella fonsa Fountain Cave Springtail G3G4 IN, OH, TN
• Pseudosinella georgia
• Pseudosinella gisini G3G4 Mexico, NC, TN, VA, WV
• Pseudosinella gisini carolina
• Pseudosinella gisini virginia
• Pseudosinella granda G3 VA
• Pseudosinella hirsuta Hirsute Cave Springtail G5 AL, GA, KY, Mexico, TN, VA
• Pseudosinella josemarii GNR WV
• Pseudosinella meganporteri G2 WV
• Pseudosinella nata G1 AL, Mexico, TN
• Pseudosinella ops VA
• Pseudosinella orba G3G4 KY, Mexico, NC, TN, VA, WV
• Pseudosinella pecki Peck's Cave Springtail G2G3 AL, FL, GA, NC, TN
• Pseudosinella rolfsi
• Pseudosinella sexoculata
• Pseudosinella sp. n. (sexoculata complex)
• Pseudosinella spinosa Spiny Cave Springtail G5 AL, GA, Mexico, TN
• Pseudosinella testa Shelled Cave Springtail G2G3 AR, Mexico, VA, WV
• Pseudosinella vespera G2 NC, VA
• Pseudosinella violenta
• Pseudosinella vita G1G2 Mexico, NM
• Pseudotremia acheron G1G2 TN
• Pseudotremia aeacus G1G2 GA
• Pseudotremia amphiorax G1G2 KY
• Pseudotremia armesi
• Pseudotremia barri Barr's Cave Millipede G2 TN
• Pseudotremia blacki Black's Cave Milliped G1 IN
• Pseudotremia burnsorum Burn's Cave Milliped G1G2 IN
• Pseudotremia callae Call's Cave Milliped G1 TN
• Pseudotremia carterensis G2G3 IN, KY
• Pseudotremia cavernarum Ellett Valley Pseudotremia Millipede G2G3 IN, KY, TN, VA
• Pseudotremia cerberus Cerberus Cave Milliped G1 VA
• Pseudotremia cercops G1 TN
• Pseudotremia cocytus
• Pseudotremia conservata TNC Cave Milliped G1G2 IN
• Pseudotremia contorta Twisted-gonopod Cave Milliped G1 VA
• Pseudotremia cookorum Cook's Cave Milliped G1G2 IN
• Pseudotremia culveri Culver's Cave Milliped G1 VA
• Pseudotremia deprehendor G1 TN, VA
• Pseudotremia douglasi Douglas' Cave Milliped G1 TN
• Pseudotremia eburnea G2G4 AL, GA, TN, VA
• Pseudotremia fergusoni Ferguson's Cave Milliped G1 VA
• Pseudotremia fongi GNR WV
• Pseudotremia fracta
• Pseudotremia fulgida Greenbrier Valley Cave Millipede G3 WV
• Pseudotremia garlandae Garland's Cave Millipede G1 TN
• Pseudotremia handi GNR WV
• Pseudotremia hobbsi
• Pseudotremia hoffmani Hoffman's Cave Millipede GNR TN
• Pseudotremia hollidayi Holliday's Cave Milliped G1 TN
• Pseudotremia hubbardi Hubbard's Cave Milliped G1G2 VA
• Pseudotremia indianae Blue River Cave Millipede G4 IN
• Pseudotremia inexpectata Devault's Cave Milliped G1 VA
• Pseudotremia jaculohamatum Harpoon Cave Milliped G1 VA
• Pseudotremia johnholsingeri Holsinger's Cave Milliped G1 VA
• Pseudotremia kerboi GNR WV
• Pseudotremia laudermilki Laudermilk's Cave Millipede GNR KY
• Pseudotremia lethe G1 TN
• Pseudotremia lictor G1 TN
• Pseudotremia loomisi Loomis's Rough-backed Millipede G1 VA
• Pseudotremia lusciosa Germany Valley Cave Millipede G1 WV
• Pseudotremia manni Mann's Cave Millipede G1 TN
• Pseudotremia merops G1 KY
• Pseudotremia minos G1 AL, TN
• Pseudotremia momus
• Pseudotremia nefanda Clark Cave Millipede G3G4 IN
• Pseudotremia nodosa G4 TN, VA
• Pseudotremia nyx G1 AL
• Pseudotremia orndorffi Orndorff's Cave Milliped G2 VA
• Pseudotremia peponocranium Pumpkin-headed Cave Milliped G1 VA
• Pseudotremia piscator Fisher Cave Milliped G1 VA
• Pseudotremia princeps
• Pseudotremia purselli Pursell's Cave Milliped G1 IN
• Pseudotremia reynoldsae Reynolds Cave Millipede G1 IN
• Pseudotremia rhadamanthus G1G2 AL, TN
• Pseudotremia roebuckorum Roebuck's Cave Millipede G1 TN
• Pseudotremia ryensis Rye Cove Cave Milliped G1 VA
• Pseudotremia salifodina Jones' Saltpetre Cave Milliped G1 VA
• Pseudotremia salisae Salisa's Cave Milliped G2 IN, OH
• Pseudotremia schneiderae GNR WV
• Pseudotremia sheari Shear's Cave Millipede GNR TN
• Pseudotremia shelleyi Shelley's Cave Millipede GNR NC
• Pseudotremia spira G1 KY
• Pseudotremia styx GNR KY
• Pseudotremia tuberculata G3 VA
• Pseudotremia unca G1 KY
• Pseudotremia valga G1G2 TN, VA
• Pseudotremia wallaceae Wallace's Cave Millipede G1 TN
• Pseudotremia withersi Withers' Cave Millipede G1 TN
• Psilochorus cordatus
• Psychoda cinerea
• Psychoda minuta
• Psychoda phalaenoides
• Psychoda pusilla
• Psychoda reevesi
• Psychoda satchelli
• Psychoda umbracola
• Psychopomporus felipi GNR TX
• Psyllipsocus ramburii
• Ptenothrix atra
• Ptenothrix marmorata
• Ptenothrix quadrangularis
• Pterostichus coracinus
• Pterostichus lachrymosus
• Pterostichus relictus
• Ptomaphagus appalachianus
• Ptomaphagus barri G2G3 TN
• Ptomaphagus bedfordensis
• Ptomaphagus californicus
• Ptomaphagus cavernicola
• Ptomaphagus chromolithus G2G3 AL, TN
• Ptomaphagus cocytus G1G2 AZ
• Ptomaphagus consobrinus
• Ptomaphagus cumberlandus
• Ptomaphagus elabra
• Ptomaphagus episcopus G1G2 AL
• Ptomaphagus fecundus G1 TN
• Ptomaphagus fiskei G1G2 GA
• Ptomaphagus fumosus
• Ptomaphagus giaquintoi
• Ptomaphagus gypsum
• Ptomaphagus hatchi Hatch's Cave Fungus Beetle G3 AL, TN
• Ptomaphagus hazelae G1G2 AL
• Ptomaphagus hirtus Kentucky Cave Beetle G4 KY
• Ptomaphagus hubrichti G2G3 TN
• Ptomaphagus inyoensis CA
• Ptomaphagus julius G1G2 AL
• Ptomaphagus laticornis G1G2 AL
• Ptomaphagus leo
• Ptomaphagus loedingi G1G2 AL
• Ptomaphagus longicornis G3G4 AL
• Ptomaphagus nashvillensis
• Ptomaphagus neojonesi
• Ptomaphagus parashant AZ
• Ptomaphagus shapardi
• Ptomaphagus solanum G1 AL
• Ptomaphagus spelaeus
• Ptomaphagus torodei Torode's Cave Fungus Beetle G1G2 AL
• Ptomaphagus ulkei
• Ptomaphagus valentinei Valentine's Cave Fungus Beetle G3G4 AL
• Ptomaphagus walteri G1G2 AL
• Ptomaphagus whiteselli G2G3 AL, GA
• Ptyoiulus impressus
• Puliciphora suavis
• Puliciphora virginiensis
• Pygmarrhopalites altus G2G3 KY
• Pygmarrhopalites arcus GNR ID
• Pygmarrhopalites ashcraftensis G1 IN
• Pygmarrhopalites ater Black Medusa Cave Springtail G3 IL, IN
• Pygmarrhopalites benitus
• Pygmarrhopalites bimus G3G4 IA, IN, KY, TN
• Pygmarrhopalites buffaloensis AR
• Pygmarrhopalites caedus G3 VA
• Pygmarrhopalites carolynae Carolyn's Cave Springtail G4 IL, IN, VA, WV
• Pygmarrhopalites clarus Clarus Cave Springtail G4 AR, MO, SD, VA, WA, WI, WV
• Pygmarrhopalites commorus G2G3 VA, WV
• Pygmarrhopalites dubius G2G3 AR, IA, MN
• Pygmarrhopalites fransjanssens IL
• Pygmarrhopalites hirtus
• Pygmarrhopalites hubbardi CO
• Pygmarrhopalites incantator IL
• Pygmarrhopalites jay G2G3 OK
• Pygmarrhopalites lacuna G1G2 VA
• Pygmarrhopalites leonardwoodensis MO
• Pygmarrhopalites lewisi Lewis' Cave Springtail GNR IL, IN
• Pygmarrhopalites madonnensis Madonna Cave Springtail GNR IL
• Pygmarrhopalites marshalli G3 TN, VA
• Pygmarrhopalites obtusus G1 VA
• Pygmarrhopalites pavo G3 IN, MO, TN, VA, WV
• Pygmarrhopalites plethorasari MO
• Pygmarrhopalites pygmaeus
• Pygmarrhopalites sacer G2 VA, WV
• Pygmarrhopalites salemensis IL
• Pygmarrhopalites sapo IL
• Pygmarrhopalites sextus G1 VA
• Pygmarrhopalites shoshoneiensis NV
• Pygmarrhopalites silvus G2 VA
• Pygmarrhopalites texensis G3G4 TX
• Pygmarrhopalites youngsteadtii AR
• Pygmephorus designatus
• Pygmephorus whitakeri
• Quedius alesi
• Quedius capucinus
• Quedius erythrogaster
• Quedius fulgidus
• Quedius mesomelinus
• Quedius spelaeus
• Remasellus parvus G1G2 FL
• Rhadine austinica G1G2 TX
• Rhadine babcocki
• Rhadine bullis GNR TX
• Rhadine caudata
• Rhadine exilis G3 TX
• Rhadine grubbsi TX
• Rhadine howdeni
• Rhadine infernalis G2G3 TX
• Rhadine insolita G1G2 TX
• Rhadine ivyi TX
• Rhadine koepkei G1 TX
• Rhadine larvalis
• Rhadine longicollis
• Rhadine noctivaga G1G2 TX
• Rhadine ozarkensis GH AR
• Rhadine persephone Tooth Cave Beetle G1G2 TX
• Rhadine reyesi GNR TX
• Rhadine rubra
• Rhadine russelli G1G2 TX
• Rhadine speca G2 TX
• Rhadine sprousei TX
• Rhadine subterranea G2 TX
• Rhadine tenebrosa G1G2 TX
• Rhagidia diversicolor
• Rhagidia varia G5 VA, WV
• Rhantus suturalis
• Rheocyclops indiana Indiana Groundwater Copepod G1 IN, TN
• Rheocyclops virginianus VA
• Rhexidermis huardi
• Rhinocricus ocraceus
• Rhinotus panamanus
• Rhyacophila nigrita
• Robustocheles hilli
• Robustocheles occulta G2G3 AB, IA, WA
• Rotomelita ana G1G2 HI
• Rotomelita lokoa G1G2 HI
• Rudiloria trimaculata
• Rudolfina cavernicola
• Rugathodes sexpunctatus
• Rugilus dentatus
• Rugosuscandona scharfi TX
• Ryloviella pilosa
• Rymosia fasciata
• Rymosia filipes
• Rymosia triangularis
• Sabacon cavicolens
• Saetigerocreagris phyllisae
• Sagittocythere barri G5 AL, IN, KY, TN
• Sagittocythere stygia G1 KY
• Salmasellus howarthi GNR OR, WA
• Salmasellus steganothrix G2 AB, MT
• Scaphinotus andrewsii
• Scaphinotus unicolor
• Scatopse notata
• Schaefferia asymmetrica CO
• Schaefferia steinmanni CO
• Schaefferia unica CO
• Schizocosa ocreata
• Schizocosa saltatrix
• Schornikovdona bellensis TX
• Schrankia howarthi HI
• Sciaphilus asperatus
• Sciara inconstans
• Sciodrepoides latinotum
• Sciodrepoides terminans
• Sclerobunus cavicolens G1G2 MT
• Sclerobunus jemez NV
• Sclerobunus klomax GNR NM
• Sclerobunus madhousensis G1G2 UT
• Sclerobunus speoventus CO
• Sclerobunus steinmanni CO
• Sclerobunus ungulatus G1G2 NV
• Scoliocentra brachypterna
• Scoliocentra fraterna
• Scoliocentra tincta
• Scoliopteryx libatrix
• Scolopocryptops sexspinosus
• Scoterpes alabama Alabama Cave Millipede AL
• Scoterpes austrinus G3G4 AL, GA
• Scoterpes blountensis TN
• Scoterpes copei G3G4 GA, KY, TN
• Scoterpes hesperus TN
• Scoterpes jackdanieli TN
• Scoterpes musicarustica TN
• Scoterpes nudus GA
• Scoterpes sollmani Sollman's Cave Millipede G1 IN
• Scoterpes stewartpecki Peck's Cave Millipede AL, TN
• Scoterpes syntheticus AL
• Scoterpes tombarri Barr's Cave Millipede KY, TN
• Scoterpes tricorner TN
• Scoterpes ventus G3 TN
• Scoterpes willreevesi Reeves' Cave Millipede AL, GA
• Scotinella redempta
• Scutacarus strinatii
• Scutigera coleoptrata
• Scytodes intricata
• Scytonotus australis
• Scytonotus granulatus
• Seborgia hershleri G1G2 TX
• Seborgia relicta G2G3 TX
• Sehirus cinctus
• Sejus sanborni
• Selachochthonius heterodentatus
• Semionellus placidus
• Sensillanura barberi
• Sensillanura illina
• Sepedophilus crassus
• Sepedophilus littoreus
• Sequoiadesmus krejcae CA
• Shibaia longisensilla
• Sicifera bifurca
• Sicifera dentata
• Sigmocheir calaveras
• Sigmoria fumimontis
• Simulium parnassum
• Simulium tuberosum
• Simulium venustum
• Simulium vernum
• Sinella agna G3G4 WV
• Sinella alata G5 IN, Mexico
• Sinella avita Avita Cave Springtail G3G4 IL, IN, KY, MO, Mexico
• Sinella baca G3G4 BC, CA, TX
• Sinella barri Barr's Cave Springtail G5 AL, AR, IL, IN, KY, MO, Mexico, TN, VA, WI
• Sinella basidens G3G4 IN, KY, TN
• Sinella caeca
• Sinella cavernarum G5 IL, IN, KY, LA, MD, MO, OH, PA, TN, VA, WA
• Sinella hoffmani Hoffman's Cave Springtail G5 KY, MD, Mexico, PA, TN, VA, WV
• Sinella krekeleri G3G4 KY, Mexico, WV
• Sinella tecta G1G2 CA
• Sinella yosiia G2G3 HI
• Sitonia hispidulus
• Sitophilus oryzae
• Skistodiaptomus pallidus
• Sminthurides lepus
• Sminthurides malmgreni
• Sminthurinus henshawi
• Soldanellonyx chappuisi
• Soldanellonyx chapuisi G1 IN
• Soldanellonyx monardi
• Soldanellonyx morardi G1 IN
• Solenopsis geminata
• Somatochlora tenebrosa
• Spelaeorchestia koloana Kauai Cave Amphipod G1G2 HI
• Spelaeorchestia pahoehoe HI
• Speleobama vana G1 AL
• Speleochus blanchardensis AR, AZ
• Speleochus croceus G1G2 AL
• Speleochus eurous G2G3 AL
• Speleochus ferus G1G2 AL, TN
• Speleochus macosar AR, AZ
• Speleochus steevesi G4 AL, TN
• Speleochus stygicus G1G2 AL
• Speleochus synstygicus G1 AL
• Speleomaster lexi G1G2 ID
• Speleomaster pecki G1G2 ID
• Speleonura kenchristianseni G1 VA
• Speleonychia sengeri G1G2 WA
• Speleonycta ozarkensis Ozark Cave Bristletail AR, OK
• Spelobia clunipes
• Spelobia maculipennis
• Spelobia pseudosetaria
• Spelobia semioculata
• Spelobia tenebrarum Cave dung fly G5 AL, AR, GA, IL, IN, KY, MO, NY, OK, PA, TN, VA, WV
• Spelobia tuberculosa
• Spelungula cavernicola
• Speocirolana hardeni G2G3 TX
• Speodesmus bicornourus G2G3 TX
• Speodesmus castellanus TX
• Speodesmus echinourus G2G3 TX
• Speodesmus falcatus Sickled Cave Millipede GNR TX
• Speodesmus ivyi Ivy's Cave Millipede GNR TX
• Speodesmus reddelli Reddell's Cave Millipede GNR TX
• Speolepta leptogaster
• Speorthus reyesi TX
• Speorthus tuganbius G2G3 NM, TX
• Speoseya grahami G2G3 CA
• Speotrombicula trifurca
• Spermophora senoculata
• Sphaeridia serrata
• Sphaeroderus stenostomus
• Sphaeromicola moria G1G2 TX
• Sphendononema guildingii
• Spinanycta alabamensis Alabama Cave Bristletail AL
• Spiniphora slossonae
• Steatoda triangulosa
• Stegana coleoptrata
• Stelidota geminata
• Stenistoderus rubripennis
• Stenochironomus pulchripennis
• Stenolophus ochropezus
• Stenonema femoratum
• Stenophilus californicus G1G2 CA
• Stenoponia americana
• Stenus alacer
• Sternopsylla distincta
• Striaria eldora G2G3 CA
• Strigamia branneri
• Stygobromus abditus James Cave Amphipod G2G3 VA
• Stygobromus acicularis MO
• Stygobromus ackerlyi G1G2 GA
• Stygobromus alabamensis Alabama cave amphipod G5 AL, AR, KS, LA, MO, MS, OK, TN, TX
• Stygobromus albapinus White Pine amphipod NV
• Stygobromus allegheniensis G5 MD, NY, PA, WV
• Stygobromus amicus Friendly Cave Amphipod G1 MD
• Stygobromus anacostensis DC
• Stygobromus araeus Tidewater Interstitial Amphipod G3 NC, VA
• Stygobromus arbucklensis Arbuckle Mountains Cave Amphipod OK
• Stygobromus arizonensis Arizona Cave Amphipod G1 AZ
• Stygobromus bakeri TX
• Stygobromus balconis Balcones Cave Amphipod G2G3 TX
• Stygobromus baroodyi Rockbridge County Cave Amphipod G1 VA
• Stygobromus barri Barr's Cave Amphipod G2G3 MO, TN
• Stygobromus barryi G1 TN
• Stygobromus bifurcatus Bifurcated Cave Amphipod G3G4 TX
• Stygobromus biggersi Biggers' Cave Amphipod G2G4 MD, PA, VA, WV
• Stygobromus blinni Blinn's Cave Amphipod G1G2 AZ
• Stygobromus borealis Taconic Cave Amphipod G2G3 MA, NY, QC, VT
• Stygobromus boultoni Boulton's Cave Amphipod G1G2 AZ
• Stygobromus bowmani Bowman's Cave Amphipod G1G2 OK
• Stygobromus caecilius Cecil Groundwater Amphipod G1 MD
• Stygobromus canadensis Castleguard Cave Amphipod G1 AB
• Stygobromus carolinensis Carolina Seep Amphipod GH NC
• Stygobromus cherylae G1 CA
• Stygobromus clantoni Clanton's Cave Amphipod G4 AR, KS, MO, OK
• Stygobromus coloradensis Colorado Cave Amphipod G1G2 CO
• Stygobromus conradi Conrad's Cave Amphipod G1 VA
• Stygobromus cooperi Cooper's Cave Amphipod G1G2 WV
• Stygobromus cowani Cowan's Cave Amphipod G1 CA
• Stygobromus culveri Culver's Cave Amphipod G1 WV
• Stygobromus cumberlandus Cumberland Cave Amphipod G3G4 VA
• Stygobromus curroae Curro's Cave Amphipod G1G2 NM
• Stygobromus dejectus Cascade Cave Amphipod G1G2 TX
• Stygobromus dicksoni Dickson cave stygobromid G5 AL, GA, TN
• Stygobromus doughertyensis Dougherty Plain Cave Amphipod G1G2 FL, GA
• Stygobromus duplus G1G2 WA
• Stygobromus elatus G1 AR
• Stygobromus elliotti Elliott's Cave Amphipod G1G2 WA
• Stygobromus emarginatus Greenbrier Cave Amphipod G3 MD, WV
• Stygobromus ephemerus Ephemeral Cave Amphipod G1G2 VA
• Stygobromus estesi Craig County Cave Amphipod G4 VA
• Stygobromus exilis Central Kentucky Cave Amphipod G5 AL, KY, TN
• Stygobromus fecundus G1G2 TN
• Stygobromus felleri Feller's Groundwater Amphipod G1 MD
• Stygobromus fergusoni Ferguson's Cave Amphipod G1 VA
• Stygobromus finleyi Finley's Cave Amphipod G3G4 TN, VA
• Stygobromus flagellatus Ezell's Cave Amphipod G2G3 TX
• Stygobromus floridanus Florida Panhandle Cave Amphipod G1G2 CA, FL
• Stygobromus foliatus Rappahannock Spring Amphipod G2 MD, VA
• Stygobromus fontinalis G1G2 CO
• Stygobromus franzi Franz's Cave Amphipod G3G4 MD, PA, WV
• Stygobromus gallawayae Gallaway's Cave Amphipod G1 CA
• Stygobromus gardneri AR, MO
• Stygobromus glacialis Glacier National Park Cave Amphipod G1 MT
• Stygobromus gracilipes G3G4 MD, PA, VA, WV
• Stygobromus gradyi Grady's Cave Amphipod G1 CA
• Stygobromus grahami Graham's Cave Amphipod G2 CA
• Stygobromus grandis G1 GA
• Stygobromus hadenoecus Devil's Sinkhole Amphipod G1G2 TX
• Stygobromus harai Hara's Cave Amphipod G1 CA
• Stygobromus hayi Hay's Spring Amphipod G1G2 DC, PA
• Stygobromus herbsti Herbst's Cave Amphipod G2G3 NV
• Stygobromus heteropodus Pickle Springs Amphipod G1G2 MO
• Stygobromus hoffmani Hoffman's Cave Amphipod G2 VA
• Stygobromus holsingeri Holsinger's Cave Amphipod G1G2 CO
• Stygobromus hubbardi Hupp's Hill Cave Amphipod G1 VA
• Stygobromus hubbsi Malheur Cave Amphipod G1G2 OR
• Stygobromus hyporheicus Hyporheic Amphipod G1 CA
• Stygobromus idahoensis Idaho Groundwater Amphipod G1 ID
• Stygobromus imperialis Imperial Cave Amphipod G1 CA
• Stygobromus indentatus Tidewater Amphipod G3 MD, NC, VA
• Stygobromus inexpectatus G1 AL
• Stygobromus interitus New Castle Murder Hole Cave Amphipod G1G2 VA
• Stygobromus interstitialis Interstitial Amphipod G1G3 CO
• Stygobromus iowae Iowa Cave Amphipod G2G3 IA, IL, MN
• Stygobromus jemezensis Jemez Mountains Groundwater Amphipod G1G2 NM
• Stygobromus kenki Rock Creek Groundwater Amphipod G2 DC, MD, VA
• Stygobromus lacicolus Lake Tahoe Groundwater Amphipod G1 CA, NV
• Stygobromus lanensis Lane County Groundwater Amphipod G1G2 OR
• Stygobromus latus G1G3 WA
• Stygobromus leensis Lee County Cave Amphipod G1G2 VA
• Stygobromus limbus Border Cave Amphipod G1G2 TX
• Stygobromus longipes Long-legged Cave Amphipod G2G3 TX
• Stygobromus lucifugus Rubious Cave Amphipod G1G2 IL
• Stygobromus mackenziei MacKenzie's Cave Amphipod G1 CA
• Stygobromus mackini Southwestern Virginia Cave Amphipod G5 IN, KY, TN, TX, VA, WV
• Stygobromus mausi Round Hill Cave Amphipod G1 VA
• Stygobromus minutus G2G3 GA
• Stygobromus montanensis G1G2 MT
• Stygobromus montanus Mountain Cave Amphipod G1 AR
• Stygobromus morrisoni Morrison's Cave Amphipod G1G2 VA, WV
• Stygobromus mundus Bath County Cave Amphipod G1 VA
• Stygobromus myersae Myers' Groundwater Amphipod G1 CA, NV
• Stygobromus mysticus Secret Cave Amphipod G1 CA
• Stygobromus nanus G1 WV
• Stygobromus nortoni Norton's Cave Amphipod G2G3 TN
• Stygobromus obrutus Pittsylvania Well Amphipod G1G2 VA
• Stygobromus obscurus G1G2 MT
• Stygobromus onondagaensis Onondaga Cave Amphipod G3 AR, KS, MO, OK
• Stygobromus oregonensis G1G2 OR
• Stygobromus ozarkensis Ozark Cave Amphipod G4 AR, MO, OK
• Stygobromus parvus Minute Cave Amphipod G2 VA, WV
• Stygobromus paveki Pavek's Groundwater Amphipod MD
• Stygobromus paxillus Prettyboy Groundwater Amphipod G1 MD
• Stygobromus pecki Peck's Cave Amphipod G1G2 TX
• Stygobromus pennaki Pennak Cave Amphipod G2G3 CO
• Stygobromus phreaticus Northern Virginia Well Amphipod G1 VA
• Stygobromus pizzinii Pizzini's Cave Amphipod G3G4 DC, MD, PA, VA
• Stygobromus pollostus Least Cave Amphipod G2G3 WV
• Stygobromus pseudospinosus Luray Caverns Amphipod G1 VA
• Stygobromus putealis Wisconsin Well Amphipod G2G3 WI
• Stygobromus puteanus G1G2 MT
• Stygobromus quatsinensis Quatsino Cave Amphipod G1G2 AK, BC
• Stygobromus rallus Narrow Groundwater Amphipod G1G3 WA
• Stygobromus redactus Pattons Cave Amphipod G1 WV
• Stygobromus reddelli G1G2 TX
• Stygobromus rudolphi Rudolph's Groundwater Amphipod G1 CA
• Stygobromus russelli Russell's Cave Amphipod G4 TX
• Stygobromus saltuaris Williamette Natonal Forest Groundwater Amphipod G1G2 OR
• Stygobromus scottsruni Scotts Run Groundwater Amphipod VA
• Stygobromus secundus G1 AB
• Stygobromus sextarius Capital Area Groundwater Amphipod G1 DC, MD, VA
• Stygobromus sheldoni Sheldon's Groundwater Amphipod G1 CA
• Stygobromus sierrensis Sierra Groundwater Amphipod G1 CA
• Stygobromus simplex Simple Cave Amphipod G1G2 CO
• Stygobromus smithi Alabama Well Amphipod G2G3 AL, TN
• Stygobromus sparsus Gregory Cave Amphipod G1 TN
• Stygobromus spinatus Spiny Cave Amphipod G2G3 VA, WV
• Stygobromus spinosus Blue Ridge Cave Amphipod G3 VA
• Stygobromus stegerorum Madison Cave Amphipod G1 VA
• Stygobromus stellmacki Stellmack's Cave Amphipod G1G2 PA
• Stygobromus subtilis Subtle Cave Amphipod G2 IL, MI, MO
• Stygobromus tahoensis G1 CA, NV
• Stygobromus tenuis G4 CT, DC, MA, MD, NY, PA, VA, WV
• Stygobromus trinus Trinity County Cave Amphipod G1 CA
• Stygobromus tritus Worn Groundwater Amphipod G1 MT
• Stygobromus urospinatus Spinose Cave Amphipod G1G3 CO
• Stygobromus utahensis Utah Cave Amphipod G1G2 UT
• Stygobromus vitreus Mammoth Cave stygobromid G4 AL, IN, KY, TN
• Stygobromus wahkeenensis Wahkeena Creek Groundwater Amphipod G1G2 OR
• Stygobromus wardi Ward's Groundwater Amphipod G1G2 CO
• Stygobromus wengerorum Wenger Cave Amphipod G1 CA
• Stygonyx courtneyi G1G2 OR
• Stygoparnus comalensis Comal Springs Dryopid Beetle G1G2 TX
• Stygoporus oregonensis G1G2 OR
• Superodontella cornifer
• Superodontella substriata
• Syngrapha alias
• Syrphus rectus
• Tachinus fimbriatus
• Tachinus fumipennis
• Tachycines asynamorus
• Tachypeza humeralis
• Tachyporus maculipennis
• Tachys proximus
• Tachys pumilus
• Tachys scitulus
• Tachyura lutea
• Taiyutyla loftinae CA
• Tanytarsus recurvatus
• Taracus aspenae OR
• Taracus fluvipileus CA
• Taracus marchingtoni OR
• Taracus silvestrii G1G2 OR
• Taracus taylori GNR NV
• Taranucnus ornithes
• Tarlina noorundi
• Tarnania tarnanii
• Tartarocreagris altimana G1G2 TX
• Tartarocreagris amblyopa G1G2 TX
• Tartarocreagris attenuata G1G2 TX
• Tartarocreagris domina G1G2 TX
• Tartarocreagris grubbsi G1G2 TX
• Tartarocreagris hoodensis G1G2 TX
• Tartarocreagris infernalis G2G3 TX
• Tartarocreagris intermedia G1G2 TX
• Tartarocreagris proserpina G1G2 TX
• Tartarocreagris reyesi GNR TX
• Tartarocreagris texana Tooth Cave Pseudoscorpion G1G2 TX
• Tayshaneta anopica G1G2 TX
• Tayshaneta archambaulti GNR TX
• Tayshaneta bullis GNR TX
• Tayshaneta concinna G1G2 TX
• Tayshaneta fawcetti GNR TX
• Tayshaneta microps Government Canyon Bat Cave Spider G1 TX
• Tayshaneta myopica Tooth Cave Spider G1G2 TX
• Tayshaneta oconnorae GNR TX
• Tayshaneta sandersi GNR TX
• Tayshaneta sprousei GNR TX
• Tayshaneta vidrio GNR TX
• Tayshaneta whitei GNR TX
• Tectocepheus velatus
• Tegenaria domestica
• Tegenaria pagana
• Telomerina cana
• Telomerina chillcotti
• Telomerina flavipes
• Tenuiphantes sabulosus
• Terrilimosina racovitzai
• Tethysbaena texana GNR TX
• Tetracion jonesi Jones' Cave Millipede G3G4 AL, TN
• Tetracion tennesseensis Tennessee Cave Millipede G2G3 TN
• Tetragnatha elongata
• Tetragnatha laboriosa
• Tetragnatha shoshone
• Tetragnatha versicolor
• Texamaurops reddelli Kretschmarr Cave Mold Beetle G1G2 TX
• Texanobathynella aaronswinki TX
• Texanobathynella bowmani GNR TX
• Texanobathynella coloradoensis TX
• Texanobathynella sachi CA
• Texella cokendolpheri Cokendolpher Cave Harvestman G1 TX
• Texella elliotti TX
• Texella hardeni G1G2 TX
• Texella hilgerensis TX
• Texella martensi CA
• Texella mulaiki G2G3 TX
• Texella reyesi Bone Cave Harvestman G2G3 TX
• Texella shoshone Shoshone Cave Harvestman G1 CA
• Texella tuberculata TX
• Texella welbourni G1G2 NM
• Texella whitei TX
• Texicerberus amistad GNR TX
• Texicerberus castilloi TX
• Texicerberus schotteae GNR TX
• Texiweckelia texensis G2G3 TX
• Texiweckeliopsis insolita G3 TX
• Texoreddellia aquilonalis TX
• Texoreddellia capitesquameo TX
• Texoreddellia coahuilensis Mexico, TX
• Texoreddellia media TX
• Texoreddellia occasus TX
• Texoreddellia texensis G4 TX
• Thalassaphorura encarpata
• Thalkethops grallatrix G1G2 NM
• Thaumatogryllus cavicola Vovanoes Cave Cricket G1G2 HI
• Theatops phanus G2G3 TX
• Theotima makua G2G3 HI
• Theridion flavonotatum
• Theridion glaucescens
• Theridiosoma gemmosum
• Theridula opulenta
• Thermobia domestica
• Theromaster brunnea
• Thesiastes fossulatus
• Thornburghiella kincaidi
• Thymoites marxi
• Thymoites minero G1G2 AZ
• Tidarren sisyphoides
• Tingupa pallida Tingupa Cave Millipede G4 AR, IL, MO, TN
• Tipula abdominalis
• Tipula algonquin
• Tipula caloptera
• Tmesiphorus costalis
• Tolus appalachius Appalachian Cave Spider G3G4 AL, TN
• Tomocerus curtus
• Tomocerus dubius
• Tomocerus flavescens
• Tomocerus vulgaris
• Tomoderus impressulus
• Toxidium compressum
• Trachelipus rathkii
• Traegaardhia gracilis
• Traegaardhia holsingeri AR, KY, MO, OK
• Traegaardhia paralleloseta G1 VA
• Traegaardhia similis AR, MO
• Trechus cumberlandus
• Trechus tennesseensis
• Trechus tuckaleechee
• Triacanthella copelandi
• Trichobius major
• Trichocera fattigiana
• Trichocera hiemalis
• Trichocera maculipennis
• Trichocera regelationis
• Trichocera regulationis
• Trichomorpha capillata
• Trichoniscus provisorius
• Trichoniscus pusillus
• Trichopetalum dux
• Trichopetalum stannardi
• Trichopetalum uncum GNR AR, IN, MO
• Trichophya pilicornis
• Trichotichnus dichrous
• Trichotichnus fulgens
• Tridenchthonius juxtlahuaca
• Trigenotyla blacki Black's cave millipede G1 OK
• Trigenotyla parca
• Trimiomelba dubia
• Triphosa haesitata
• Trisetobisium fallax
• Trochosa terricola
• Troglocambarus maclanei North Florida Spider Cave Crayfish G1G2 FL
• Trombicula cavernarum
• Trombicula tibbettsi
• Tropisternus collaris
• Tropocyclops extensus
• Tropocyclops prasinus
• Trox aequalis
• Trox laticollis
• Trox scaber
• Tuberochernes aalbui G1G2 CA
• Tuberochernes cohni GNR AZ
• Tuberochernes ubicki G1 AZ
• Tuberona leonidasi TX
• Tullbergia clavata
• Tullbergia granulata
• Tullbergia macrochaeta
• Tychobythinus bythinioides
• Tychobythinus hubrichti G1G2 KY
• Tychobythinus jonesi G1G2 AL
• Tychobythinus strinatii G1G2 TN
• Tylparua troglodytes HI
• Typhlobius caecus
• Typhlobius coecus
• Typhloelmis caroline GNR TX
• Typhloelmis finegan GNR TX
• Typhloelmis sanfelipe GNR TX
• Typhloelmis spangleri GNR TX
• Typhlogastrura alabamensis G1G2 AL
• Typhlogastrura christianseni G1 AL, TN
• Typhlogastrura fousheensis Foushee Cave Springtail G1 AR
• Typhlogastrura helleri Heller Cave Springtail GNR PA
• Typhlogastrura hubbardi G2G3 VA
• Typhlogastrura valentini Valentine's Cave Springtail G1 VA
• Typhlonesticus silvestrii
• Tyrannochthonius alabamensis
• Tyrannochthonius aladdinensis G1 AL
• Tyrannochthonius aralu G1 AL
• Tyrannochthonius archeri G1 AL
• Tyrannochthonius attenuatus G1 AL
• Tyrannochthonius avernicolus G1 AL
• Tyrannochthonius barri Barr's Cave Pseudoscorpion G1 AL
• Tyrannochthonius binoculatus G1 AL
• Tyrannochthonius chamberlini G1 AL
• Tyrannochthonius charon G1 AL
• Tyrannochthonius diabolus G1G2 AL
• Tyrannochthonius erebicus G1 AL
• Tyrannochthonius felix G1 AL
• Tyrannochthonius fiskei G1 TN
• Tyrannochthonius gnomus G1 AL
• Tyrannochthonius halopotamus G1 AL, TN
• Tyrannochthonius hypogeus G1 KY
• Tyrannochthonius infernalis G1 AL
• Tyrannochthonius jonesi Jones' Cave Pseudoscorpion G1 AL
• Tyrannochthonius muchmoreorum GNR TX
• Tyrannochthonius nergal G1 AL
• Tyrannochthonius orpheus G1G2 AL
• Tyrannochthonius osiris G1 AL
• Tyrannochthonius parvus G1G2 AL
• Tyrannochthonius pecki Peck's Cave Peudoscorpion G1 AL
• Tyrannochthonius pholeter G1 AL
• Tyrannochthonius pluto G1G2 AL
• Tyrannochthonius pupukeanus G1 HI
• Tyrannochthonius satan G1 AL
• Tyrannochthonius sheltae Shelta Cave Pseudoscorpion G1 AL
• Tyrannochthonius skeletonis G1 AL
• Tyrannochthonius steevesi Steeves' Cave Pseudoscorpion G1 TN
• Tyrannochthonius stonei HI
• Tyrannochthonius stygius G1 AL
• Tyrannochthonius tartarus G1 AL
• Tyrannochthonius tenuis G1 AL
• Tyrannochthonius torodei Torode's Cave Pseudoscorpion G1 AL
• Tyrannochthonius troglodytes G1G2 TX
• Ufocandona hannaleeae TX
• Ula elegans
• Uloborus glomosus
• Ulomorpha pilosella
• Uncinocythere ambophora G2G3 FL
• Uncinocythere equicurva
• Uncinocythere pholetera G1G2 MO
• Uncinocythere simondsi
• Uncinocythere warreni G1 AR, FL, GA
• Uncinocythere xania G3 AR, GA, IN, MO
• Uncinocythere zancla
• Uroblaniulus canadensis
• Uroctonus grahami G1G2 CA
• Uroseius infirmus
• Usofila gracilis G1G2 CA
• Uvarus texanus
• Vachonium boneti
• Vachonium maya
• Vaejovis carolinianus
• Validiblatta australasiae
• Varacosa avara
• Veigaia bakeri Baker's Cave Mite G1 IN, NM
• Veigaia kochi
• Veigaia wyandottensis Wyandotte Cave Mite G1 IN
• Venezillo cacahuamilpensis
• Vetericaris chaceorum G1 HI
• Vitronura giselae
• Vulcanochthonius aa HI
• Vulcanochthonius howarthi G1G2 HI
• Vulcanochthonius pohakuloae HI
• Wadotes calcaratus
• Wadotes saturnus
• Watobius anderisus
• Wormaldia moesta
• Wulfila albens
• Xenolimosina sicula
• Xenotrechus condei G1G2 MO
• Xenotrechus denticollis G1G2 MO
• Xenylla welchi
• Yunohamella lyrica
• Zealeuctra narfi
• Zosteractis interminata Zosteractis Cave Millipede G1 IL, MO
• Zygonopus krekeleri West Virginia Blind Cave Millipede G4 WV
• Zygonopus packardi Packard's Blind Cave Millipede G4 VA, WV
• Zygonopus weyeriensis Grand Caverns Blind Cave Millipede G3G4 VA, WV
• Zygonopus whitei Luray Caverns Blind Cave Millipede G3G4 VA, WV

Other resources

Catalogue of Life

RT

GBIF

54

ITIS

82696

iNaturalist

47120

NCBI Taxonomy

6656