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Subterranean biodiversity of North America and around the globe

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

False Sword-tailed Cave Amphipod
Bactrurus pseudomucronatus Koenemann & Holsinger, 2001

Taxonomy

Kingdom Animalia
Phylum Arthropoda
Subphylum Crustacea
Class Malacostraca
Order Amphipoda
Family Crangonyctidae
Genus Bactrurus
Species Bactrurus pseudomucronatus Koenemann & Holsinger, 2001

Description

Diagnostic characters

Ecological class
Stygobiont
Realm
Aquatic
Troglomorphy
Troglomorphic

Distribution

Range

Known from two states in the Ozarks karst region.

Continent

North America

Country

United States

States and provinces

Arkansas, Missouri

Counties

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

Karst regions

Ozarks

Genetics

Molecular resources

MarkerMoleculeSequences LengthExemplar
16S mitochondrial 1 271-271 bp KF430292.1
18S nuclear 1 2319-2319 bp AF202985.1
28S nuclear 1 310-310 bp KF430323.1
COI mitochondrial 1 242-242 bp KF430262.1
H3 nuclear 1 354-354 bp KF484723.1

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

Download all 5 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.

Specimens

Type material

Holotype
USNM 296423 · National Museum of Natural History, Smithsonian Institution
Allotype
USNM 1011862 · National Museum of Natural History, Smithsonian Institution
Paratype
USNM 1011863 · National Museum of Natural History, Smithsonian Institution
Paratype
ZMA.CRUS.A.204945 · Naturalis Biodiversity Center

Collections holding material

InstitutionLots
National Museum of Natural History, Smithsonian Institution 24
Naturalis Biodiversity Center 1

25 cataloged lots in 2 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 25 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.

Conservation and management

NatureServe

G2G3 Imperiled to Vulnerable

G1G2▲G3▲G4G5

Global rank last reviewed 14 October 2004.

Subnational ranks

Arkansas
S1 Critically Imperiled
Missouri
S2 Imperiled

State and federal status

Not listed under the U.S. Endangered Species Act

Other resources

Catalogue of Life
KB5J
GBIF
2217961
ITIS
656770
iNaturalist
214774
NCBI Taxonomy
112905

How to cite this account

Bactrurus pseudomucronatus Koenemann & Holsinger, 2001. Cave Biology Data Portal, account SP-0952. https://cavebiology.org/species/bactrurus-pseudomucronatus/ (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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