IUCN threat status:

Endangered (EN)


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Range Description

Range is confined to the pluvial White River system, southeastern Nevada, including springs of Moapa River (Lee et al. 1980, Deacon and Williams 1984, Page and Burr 2011).

Extent of occurrence is roughly a few hundred square kilometers (measured as a convex polygon that encompasses all populations).

Subspecies albivallis: spring remnants of uppermost White River drainage, White Pine County; occurs in Preston Big Spring, Indian Spring, Arnoldson Spring and Nicholas Spring, recently extirpated from Cold Spring and Lund Town Spring (Deacon and Williams 1984, Scoppettone and Rissler 2002).

Subspecies baileyi: spring pool of Ash Springs, Lincoln County.

Subspecies grandis: native to Crystal and Hiko springs, Lincoln County; introduced and established in Blue Link Spring in Mineral County, Nevada (see USFWS 1998).

Subspecies moapae: headwater springs of Moapa River, Clark County.

Subspecies thermophilus: Moorman and Moon River springs, and Hot Creek, Nye County (Minckley et al. 1991).


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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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