Pennsylvania Cave Amphipod
Crangonyx dearolfi Shoemaker, 1942
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Crangonyx |
| Species | Crangonyx dearolfi Shoemaker, 1942 |
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
Hobo Cave, Berks Co. PA
Range
Known from six counties across two states in the Appalachians karst region.
Continent
North America
Country
United States
States and provinces
Maryland, Pennsylvania
Counties
- Maryland
- Washington
- Pennsylvania
- Berks, Cumberland, Dauphin, Franklin, York
Karst regions
Appalachians
Specimens
Type material
- Holotype
- USNM 78266 · National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 14 |
14 cataloged lots in 1 collection. 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 14 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
IUCN Red List
EN Endangered B1+2c
Assessed in 1996.
NatureServe
G2 Imperiled
Global rank last reviewed 17 March 2008.
Subnational ranks
- Maryland
- S1 Critically Imperiled
- Pennsylvania
- S1 Critically Imperiled
- District of Columbia
- 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
- Nicholas, G. 1960. Checklist of macroscopic troglobitic organisms of the United States. The American Midland Naturalist 64: 123–160. doi:10.2307/2422897
- Zhang, J. & Holsinger, J.R. 2003. Systematics of the freshwater amphipod genus Crangonyx (Crangonyctidae) in North America. Virginia Museum of Natural History Memior 6: 1–274.
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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