| Family: |
Percidae (Perches), subfamily: Percinae |
| Max. size: |
7.73 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
North America: Cumberland, Elk, Green and Muskingum river drainages of the Ohio River basin, USA. Known only to be extant in the Elk River, West Virginia. |
| Diagnosis: |
Dorsal spines (total): 11-13; Dorsal soft rays (total): 11-15; Anal soft rays: 11-13. Distinguished from populations of Crystallaria asprella of the Gulf Coast, Mississippi River and Wabash River by a combination of the following features: gape width larger approximately equal to or exceeding the inter-pelvic fin base width; a preorbital blotch distinctly separate from the anterior orbital rim; pelvic fins distinctly falcate in both sexes; cheek scale rows reduced (modally 2); opercle scale rows reduced (modally 2); number of midlateral blotches higher (modally 13); number of anal-fin rays lower (modally 13); number of dorsal-fin spines lower (modally 12); and scales below the lateral line higher (modally 11) (Ref. 74948). |
| Biology: |
Found mostly in waters with moderate flows over a sand, gravel and cobble mix of benthic substrate within the lower sections of riffles or upper parts of pools (Ref. 75199). |
| IUCN Red List Status: |
Critically Endangered (CR); Date assessed: 14 November 2011 (B1ab(iii)) Ref. (130435)
|
| Threat to humans: |
harmless |
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