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Gila nigra Cope, 1875 Headwater chub |
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photo by
Sandra J. Raredon / Smithsonian Institution, NMNH, Div. of Fishes |
| Family: | Leuciscidae (Minnows), subfamily: Laviniinae | |||
| Max. size: | 38 cm TL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | North America: Gila River system (Colorado River drainage) in New Mexico and Arizona, USA. | |||
| Diagnosis: | Dorsal soft rays (total): 8-8; Anal soft rays: 8-8. Previously thought to be of hybrid origin and similar to parental Gila robusta and G. intermedia. Dorsal and anal fins with 8 rays; lateral line with 71-90 scales, usually fewer than 80; first gill arch with 10 or more rakers; and often with diffuse stripes on dark gray or brown side, dark fin membranes (Ref. 86798). | |||
| Biology: | Inhabits pools and undercut banks of headwaters, creeks and small rivers. Maximum length is presumably about 38 cm TL (Ref. 86798). | |||
| IUCN Red List Status: | Near Threatened (NT); Date assessed: 09 February 2012 Ref. (130435) | |||
| Threat to humans: | harmless | |||