Illinois Cave Amphipod
Gammarus acherondytes Hubricht & Mackin, 1940
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Gammaridae |
| Genus | Gammarus |
| Species | Gammarus acherondytes Hubricht & Mackin, 1940 |
Synonyms
- Gammarus acheronytes Hubricht & Mackin, 1940 [orth. error] (subjective synonym, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
Illinois Caverns, Monroe Co. IL
Range
Known from two counties in Illinois in the Ozarks karst region.
Continent
North America
Country
United States
States and provinces
Illinois
Counties
- Illinois
- Monroe, St. Clair
Karst regions
Ozarks
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| COI | mitochondrial | 80 | 609-609 bp | EU545632.1 |
80 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 80 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
Specimens
Type material
- Syntype ×2
- National Museum of Natural History, Smithsonian Institution
- Type ×3
- Royal Ontario Museum
Collections holding material
| Institution | Lots |
|---|---|
| Illinois Natural History Survey | 21 |
| National Museum of Natural History, Smithsonian Institution | 11 |
| Royal Ontario Museum | 3 |
| Canadian Museum of Nature | 1 |
| Naturalis Biodiversity Center | 1 |
37 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 37 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
IUCN Red List
EN Endangered B1ab(ii)+2ab(ii)
Assessed in 2002.
NatureServe
G2G3 Imperiled to Vulnerable
Global rank last reviewed 18 September 2008.
Subnational ranks
- Illinois
- S1S2 Critically Imperiled to Imperiled
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
Endangered under the U.S. Endangered Species Act, listed in 1998.
Federal: Endangered
Other resources
References
- 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.
- 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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