Russell's Cave Amphipod
Stygobromus russelli (Holsinger, 1967)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus russelli (Holsinger, 1967) |
Synonyms
- Stygonectes russelli Holsinger, 1967 (prior combination, CoL)
- Stygobromus ruselli (Holsinger, 1967) (subjective synonym, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Range
Known from 17 counties in Texas in the Edwards Plateau and Balcones karst region.
Continent
North America
Country
United States
States and provinces
Texas
Counties
- Texas
- Bandera, Bell, Bexar, Blanco, Burnet, Comal, Coryell, Guadalupe, Hays, Kendall, Kerr, Mason, Medina, San Saba, Travis, Uvalde, Williamson
Karst regions
Edwards Plateau and Balcones
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| COI | mitochondrial | 9 | 501-501 bp | JQ358892.1 |
| ITS | nuclear | 2 | 212-212 bp | JQ363745.1 |
11 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 11 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
Specimens
Type material
- Holotype
- USNM 141755 · National Museum of Natural History, Smithsonian Institution
- Paratype ×2
- National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 189 |
| University of Texas, Biodiversity Center, Entomology Collection | 117 |
| Edwards Aquifer Research and Data Center, Texas State University | 90 |
396 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 396 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
- Texas
- S3 Vulnerable
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
- Gibson, R., Hutchins, B.T., Krejca, J.K., Diaz, P.H. & Sprouse, P.S. 2021. Stygobromus bakeri, a new species of groundwater amphipod (Amphipoda, Crangonyctidae) associated with the Trinity and Edwards aquifers of central Texas, USA. Subterranean Biology 38: 19–45. doi:10.3897/subtbiol.38.61787
- Hershler, R. & Longley, G. 1986. Phreatic hydrobiids (Gastropoda: Prosobranchia) from the Edwards (Balcones Fault Zone) Aquifer region, south-central Texas. Malacologia 27: 127–172. https://repository.si.edu/bitstream/handle/10088/11313/iz_HershlerLongley1986a.pdf?sequence=1&isAllowed=y. details
- Kenk, R. 1977a. Freshwater tricads (Turbellaria) of North America, IX: The genus Sphalloplana. Smithsonian Contributions to Zoology 246: 1–38. https://repository.si.edu/bitstreams/d38e70a7-fb46–474c-9ea0-f202898980ba/download. details
- Külköylüoğlu, O. & Gibson, R. 2018. A new Ostracoda (Crustacea) genus, Comalcandona gen. nov., from Texas, USA. Turkish Journal of Zoology 42: 18–28. doi:10.3906/zoo-1611-52
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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