Pizzini's Cave Amphipod
Stygobromus pizzinii (Shoemaker, 1938
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus pizzinii (Shoemaker, 1938 |
Synonyms
- Stygonectes pizzinii (Shoemaker, 1938) (prior combination, CoL)
- Synpleonia pizzinii Shoemaker, 1938 (prior combination, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
Wetzels Spring, Glover Archbold Parkway, DC
Range
Known from 12 counties across four states across two karst regions.
Continent
North America
Country
United States
States and provinces
District of Columbia, Maryland, Pennsylvania, Virginia
Counties
- Maryland
- Frederick, Montgomery, Washington
- Pennsylvania
- Bucks, Chester, Lancaster, Montgomery
- Virginia
- Arlington, Fairfax, Rockingham, Warren, Washington
Karst regions
Appalachians, Other
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| mitogenome | mitochondrial | 2 | 15176-15176 bp | NC_046510.1 |
| COI | mitochondrial | 1 | 535-535 bp | KY748255.1 |
3 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 3 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
- Mitogenome
- Available
Specimens
Type material
- Type
- USNM 76116 · National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 84 |
| American Museum of Natural History | 1 |
| Field Museum of Natural History | 1 |
| Museum of Comparative Zoology, Harvard | 1 |
| Natural History Museum, London | 1 |
| Royal Ontario Museum | 1 |
89 cataloged lots in 6 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 89 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
IUCN Red List
VU Vulnerable D2
Assessed in 1996.
NatureServe
G3G4 Vulnerable to Apparently Secure
Global rank last reviewed 21 August 2002.
Subnational ranks
- District of Columbia
- SH Possibly Extirpated
- Maryland
- S1 Critically Imperiled
- Pennsylvania
- S1 Critically Imperiled
- Virginia
- 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
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
- Nicholas, G. 1960. Checklist of macroscopic troglobitic organisms of the United States. The American Midland Naturalist 64: 123–160. doi:10.2307/2422897
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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