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Cave Biology Data Portal
Subterranean biodiversity of North America and around the globe
AnimaliaArthropodaCrustaceaMalacostracaAmphipodaCrangonyctidaeStygobromus

Stygobromus tenuis (Smith, 1874)

Taxonomy

Kingdom Animalia
Phylum Arthropoda
Subphylum Crustacea
Class Malacostraca
Order Amphipoda
Family Crangonyctidae
Genus Stygobromus
Species Stygobromus tenuis (Smith, 1874)

Description

Diagnostic characters

Ecological class
Stygobiont
Realm
Aquatic
Troglomorphy
Troglomorphic

Distribution

Type locality

wells at Middletown, Middlesex Co. CT

Range

Known from eight states across two karst regions.

Continent

North America

Country

United States

States and provinces

Connecticut, District of Columbia, Massachusetts, Maryland, New York, Pennsylvania, Virginia, West Virginia

Counties

County-level records have not been compiled for this taxon. Distribution is recorded at state and karst-region level.

Karst regions

Appalachians, Other

Genetics

Molecular resources

MarkerMoleculeSequences LengthExemplar
28S nuclear 46 377-835 bp PZ240810.1
COI mitochondrial 28 534-1539 bp PZ235420.1
18S nuclear 13 610-611 bp OR530141.1
H3 nuclear 13 329-329 bp OR506371.1
mitogenome mitochondrial 2 14712-14915 bp MN175621.1

102 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.

Download all 102 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.

Mitogenome
Available

Specimens

Type material

Holotype
USNM 141760 · National Museum of Natural History, Smithsonian Institution
Allotype
USNM 141761 · National Museum of Natural History, Smithsonian Institution
Lectotype
YPM IZ 004538.CR · Yale Peabody Museum
Syntype
YPM IZ 004537.CR · Yale Peabody Museum
Paratype ×24
National Museum of Natural History, Smithsonian Institution
Type
YPM IZ 004536.CR · Yale Peabody Museum

Collections holding material

InstitutionLots
National Museum of Natural History, Smithsonian Institution 282
Museum of Comparative Zoology, Harvard 6
Yale Peabody Museum 4

292 cataloged lots in 3 collections. Compiled from GBIF and not an exhaustive census: many collections are not yet digitised, and holdings are added continually. Search GBIF for specimen records.

Download all 292 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.

Conservation and management

NatureServe

G4 Apparently Secure

G1G2G3G4▲G5

Global rank last reviewed 21 August 2002.

Subnational ranks

Connecticut
S3 Vulnerable
District of Columbia
SNR Unranked
Massachusetts
S1 Critically Imperiled
New York
SNR Unranked
Pennsylvania
SNR Unranked
Virginia
S4 Apparently Secure
West Virginia
S2 Imperiled
Maryland
SNR Unranked

State and federal status

Not listed under the U.S. Endangered Species Act

Other resources

Catalogue of Life
538PS
GBIF
2217946
ITIS
93931
iNaturalist
231909
NCBI Taxonomy
1173323

How to cite this account

Stygobromus tenuis (Smith, 1874). Cave Biology Data Portal, account SP-1100. https://cavebiology.org/species/stygobromus-tenuis/ (accessed 3 September 2026).

Data sources and funding are listed in the Acknowledgments.

Spotted something wrong on this page? Report a correction. Accounts are compiled from many sources and corrections from people who know the group are the most useful email we get.

Cave Biology Data Portal

Species accounts, distributions, and conservation status for the subterranean fauna of North America and around the globe, with resources for the cave and karst research community.

Text and data CC BY 4.0. Images all rights reserved unless stated.

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