Ptychocheilus lucius

Taxonomy

Assessment Information

Geographic Range

Habitat and Ecology

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	CYPRINIFORMES	CYPRINIDAE

Scientific Name:

Ptychocheilus lucius

Species Authority:

Girard, 1856

Common Name/s:

English	–	Colorado Pikemeadow, Colorado River Squawfish, Colorado Squafish, Colorado Squawfish
French	–	Poisson Squaw du Colorado
Spanish	–	Pez Squaw del Colorado

Assessment Information [top]

Red List Category & Criteria:

Vulnerable D2 ver 2.3

Year Assessed:

1996

Annotations:

Needs updating

Assessor/s:

Gimenez Dixon, M.

History:

1994	–	Endangered (Groombridge 1994)
1990	–	Endangered (IUCN 1990)
1988	–	Endangered (IUCN Conservation Monitoring Centre 1988)
1986	–	Endangered (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description:	Restricted to large rivers of the Colorado River basin, formerly in the mainstream Colorado River and major tributaries (Gunnison, White, Yampa, Dolores, San Juan, Uncompahgre, Animas, and Green rivers) from Mexico and Arizona to Wyoming. Present distribution is drastically reduced from the original. By the mid-1980s it occurred only in the upper Colorado River basin of Colorado, Utah, New Mexico, and Wyoming; mainly in the Green River in Utah and in the Yampa and Colorado rivers in Colorado and portions of Utah; has not been seen below Glen Canyon Dam since 1968.
Countries:	Native: United States (Arizona, California - Possibly Extinct, Colorado, Nevada - Possibly Extinct, New Mexico, Utah, Wyoming) Possibly extinct: Mexico

Range Description:

Restricted to large rivers of the Colorado River basin, formerly in the mainstream Colorado River and major tributaries (Gunnison, White, Yampa, Dolores, San Juan, Uncompahgre, Animas, and Green rivers) from Mexico and Arizona to Wyoming. Present distribution is drastically reduced from the original. By the mid-1980s it occurred only in the upper Colorado River basin of Colorado, Utah, New Mexico, and Wyoming; mainly in the Green River in Utah and in the Yampa and Colorado rivers in Colorado and portions of Utah; has not been seen below Glen Canyon Dam since 1968.

Countries:

Native:

United States (Arizona, California - Possibly Extinct, Colorado, Nevada - Possibly Extinct, New Mexico, Utah, Wyoming)

Possibly extinct:

Mexico

Habitat and Ecology [top]

Systems:	Freshwater

Systems:

Freshwater

Citation:	Gimenez Dixon, M. 1996. Ptychocheilus lucius. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 08 February 2012.
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