Bactrurus brachycaudus Hubricht & Mackin, 1940
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Bactrurus |
| Species | Bactrurus brachycaudus Hubricht & Mackin, 1940 |
Synonyms
- Bacturus brachycaudus Hubricht & Mackin, 1940 (prior combination, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
Keifer Creek, 0.6 mi NW of Fern Glen, St. Louis Co. MO
Range
Known from 31 counties across two states across two karst regions.
Continent
North America
Country
United States
States and provinces
Illinois, Missouri
Counties
- Illinois
- Adams, Calhoun, Champaign, Green, Greene, Jackson, Johnson, Monroe, Montgomery, Pike, Sangamon, St. Clair, Union
- Missouri
- Bollinger, Boone, Crawford, Dent, Franklin, Iron, Jefferson, Lincoln, Miller, Perry, Pike, Ralls, Scott, St. Charles, St. Francois, St. Genevieve, St. Louis, Texas
Karst regions
Other, Ozarks
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| 18S | nuclear | 2 | 2322-2324 bp | AF202984.1 |
| mitogenome | mitochondrial | 2 | 14661-14661 bp | NC_046509.1 |
| 16S | mitochondrial | 1 | 292-292 bp | KF430278.1 |
| 28S | nuclear | 1 | 310-310 bp | KF430308.1 |
| COI | mitochondrial | 1 | 535-535 bp | KY748274.1 |
| H3 | nuclear | 1 | 354-354 bp | KF484707.1 |
8 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 8 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
- Mitogenome
- Available
Specimens
Type material
- Syntype
- USNM 74846 · National Museum of Natural History, Smithsonian Institution
- Syntype
- ROMIZ48954 · Royal Ontario Museum
- Type
- American Museum of Natural History
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 80 |
| Illinois Natural History Survey | 15 |
| American Museum of Natural History | 1 |
| Naturalis Biodiversity Center | 1 |
| Royal Ontario Museum | 1 |
98 cataloged lots in 5 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 98 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
NatureServe
G4 Apparently Secure
Global rank last reviewed 21 August 2002.
Subnational ranks
- Illinois
- SNR Unranked
- Missouri
- S4 Apparently Secure
Ranks looked up 23 August 2026. Conservation status changes, and a rank here is as current as that date and no more.
State and federal status
Not listed under the U.S. Endangered Species Act.
Other resources
References
- Benito, J.B., Porter, M.L. & Niemiller, M.L. 2021. The mitochondrial genomes of five spring and groundwater amphipods of the family Crangonyctidae (Crustacea: Amphipoda) from eastern North America. Mitochondrial DNA Part B 6: 1662–1667. doi:10.1080/23802359.2021.1926350
- Hubricht, L. 1943. Studies in the Nearctic freshwater amphipods, III. Notes on the freshwater Amphipoda of eastern United States, with descriptions of ten new species. The American Midland Naturalist 29: 683–712. doi:10.2307/2421157
- Lewis, J.J. & Bowman, T.E. 1981. The subterranean asellids (Caecidotea) of Illinois (Crustacea: Isopoda: Asellidae). Smithsonian Contributions to Zoology 335: 1–66. doi:10.5479/si.00810282.335
- Lewis, J.J., Moss, P., Tecic, D. & Nelson, M.E. 2003. A conservation focused inventory of subterranean invertebrates of the southwestern Illinois karst. Journal of Cave and Karst Studies 65: 9–21.
- Nicholas, G. 1960. Checklist of macroscopic troglobitic organisms of the United States. The American Midland Naturalist 64: 123–160. doi:10.2307/2422897
- Peck, S.B. & Lewis, J.J. 1978. Zoogeography and evolution of the subterranean invertebrate faunas of Illinois and southeastern Missouri. National Speleological Society Bulletin 40: 39–63.
- Taylor, S.J. & Niemiller, M.L. 2016. Biogeography and conservation assessment of Bactrurus groundwater amphipods (Crangonyctidae) in the central and eastern United States. Subterranean Biology 17: 1–29. doi:10.3897/subtbiol.17.7298
- Webb, D.W., Taylor, S.J. & Krejca, J.K. 1993. The biological resources of Illinois caves and other subterranean environments. Illinois Natural History Survey, Champaign, Illinois, USA. 143 pp.
This account was last revised 28 August 2026. Conservation ranks were looked up 23 August 2026.
How to cite this account
Data sources and funding are listed in the Acknowledgments.
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