Richardsonius egregius
Richardsonius egregius (Girard, 1858)
Lahontan redside
Richardsonius egregius
photo by Ribeiro, F.

Family:  Leuciscidae (Minnows), subfamily: Pogonichthyinae
Max. size:  17 cm TL (male/unsexed); max. reported age: 5 years
Environment:  benthopelagic; freshwater
Distribution:  North America: Lahontan and other interior basins in northern Nevada and northern California, USA including Humboldt, Walker, Carson, Truckee, Susan, Quinn and Reese River systems; Walker, Tahoe and Pyramid Lakes. Introduced elsewhere, including upper Sacramento River systems in California.
Diagnosis:  Distinguished from a similar species Richardsonius balteatus by having less anal rays (8-9, rarely 10), longer snout, more slender body and less slender caudal peduncle (Ref. 86798).
Biology:  Adults occur in margin of lakes and all types of stream habitats but usually in pools and slow runs (Ref. 86798). Migratory behaviour is undetermined (Ref. 126106).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 March 2012 Ref. (130435)
Threat to humans:  harmless


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