Bactrurus mucronatus (Forbes, 1876)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Bactrurus |
| Species | Bactrurus mucronatus (Forbes, 1876) |
Synonyms
- Crangonyx mucronatus Forbes, 1876 (prior combination, CoL)
- Eucrangonyx mucronatus (Forbes, 1876) (prior combination, CoL)
- Bacturus mucronautus (Forbes, 1876) (subjective synonym, CoL)
- Bacturus mucronatus (Forbes, 1876) (prior combination, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
Well, McLean Co. IL
Range
Known from 90 counties across seven states across two karst regions.
Continent
North America
Country
United States
States and provinces
Arkansas, Iowa, Illinois, Indiana, Michigan, Missouri, Ohio
Counties
- Arkansas
- Randolph
- Iowa
- Des Moines, Henry, Washington
- Illinois
- Adams, Bureau, Calhoun, Champaign, Christian, Coles, Crawford, DeKalb, DeWitt, Edgar, Fulton, Gallatin, Grundy, Hancock, Henderson, Henry, Knox, La Salle, LaSalle, Lee, Livingston, Logan, Macon, McClean, McDonough, McLean, Mercer, Montgomery, Morgan, Moultrie, Peoria, Rock Island, Saline, Stark, Stephenson, Tazewell, Vermilion, Vermillion, Warren, Will
- Indiana
- Allen, Benton, Blackford, Boone, Carroll, Cass, Decatur, Gibson, Grant, Hamilton, Hancock, Hendricks, Henry, Johnson, Madison, Miami, Montgomery, Morgan, Newton, Noble, Parke, Posey, Putnam, Rush, Shelby, Tippecanoe, Tipton, Warren, Wells, White
- Michigan
- Berrien, Monroe
- Missouri
- Carter, Douglas, Shannon
- Ohio
- Darke, Fulton, Huron, Lucas, Marion, Miami, Montgomery, Paulding, Preble, Wayne, Wood
Karst regions
Interior Low Plateau, Other
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| COI | mitochondrial | 2 | 242-535 bp | KY748273.1 |
| 16S | mitochondrial | 1 | 293-293 bp | KF430291.1 |
| 18S | nuclear | 1 | 2329-2329 bp | AF202978.1 |
| 28S | nuclear | 1 | 310-310 bp | KF430322.1 |
| H3 | nuclear | 1 | 354-354 bp | KF484722.1 |
6 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 6 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
Specimens
Type material
- Neotype
- USNM 81546 · National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 79 |
| Illinois Natural History Survey | 42 |
| Naturalis Biodiversity Center | 4 |
| Museum of Comparative Zoology, Harvard | 1 |
126 cataloged lots in 4 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 126 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
NatureServe
G5 Secure
Global rank last reviewed 21 August 2002.
Subnational ranks
- Illinois
- SNR Unranked
- Indiana
- SNR Unranked
- Iowa
- SNR Unranked
- Michigan
- SNR Unranked
- Ohio
- SNR Unranked
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
- Dunivan, J.D., Tumlison, C.R. & McDaniel, V.R. 1982. Cave fauna of Arkansas: further records. Journal of the Arkansas Academy of Science 36: 87–88. https://scholarworks.uark.edu/jaas/vol36/iss1/28. details
- 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
- McDaniel, V.R. & Smith, K.L. 1976. Cave fauna of Arkansas: selected invertebrate taxa. Journal of the Arkansas Academy of Science 30: 57–60. https://scholarworks.uark.edu/jaas/vol30/iss1/22. details
- 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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