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Phrynosoma hernandesi

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA REPTILIA SQUAMATA PHRYNOSOMATIDAE

Scientific Name: Phrynosoma hernandesi
Species Authority: (Girard, 1858)
Common Name/s:
English Greater Short-horned Lizard, Short-horned Lizard
Taxonomic Notes: Zamudio et al. (1997) examined mtDNA variation in short-horned lizards throughout western North America and concluded that the Pacific Northwest segment of the population should be recognized as a species (P. douglasii) distinct from the species (P. hernandesi) represented in the remainder of the range. In addition, there was no support for the recognition of any of the nominal subspecies; thus each species is best regarded as monotypic.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor/s: Hammerson, G.A.
Reviewer/s: Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification:
Listed as Least Concern in view of the relatively large and stable extent of occurrence, area of occupancy, number of subpopulations, and population size. No major threats have been identified.

Geographic Range [top]

Range Description: The range extends from southern Alberta and southern Saskatchewan south through eastern Montana, the western Dakotas, Wyoming, western Nebraska, Colorado, Utah, eastern Nevada, New Mexico, Arizona, and mountains of western Texas to southern Durango (Zamudio et al. 1997, Stebbins 2003); the range limit in the vicinity of Idaho, western Wyoming, northern Utah, and northern Nevada has not been precisely determined. Elevational range extends from 170 to around 3,440 m (900 to 11,300 feet) (Stebbins 2003).
Countries:
Native:
Canada; Mexico; United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is represented by very many occurrences that are well distributed throughout the wide range (Degenhardt et al. 1996, Hammerson 1999, Werner et al. 2004). The total adult population size is unknown but surely exceeds 10,000 and probably exceeds 100,000. The species is locally common (Degenhardt et al. 1996), but it can be fairly difficult to find in areas where it has been previously observed, even when habitat conditions appear to be stable (Hammerson 1999).
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Habitats of this lizard range from semi-arid plains to high mountains; usually the species is in open, shrubby, or openly wooded areas with sparse vegetation at ground level; soil may vary from rocky to sandy (Degenhardt et al. 1996, Hammerson 1999, Stebbins 2003, Werner et al. 2004). When not active on the surface, the lizards burrow into the soil or occupy rodent burrows.
Systems: Terrestrial

Threats [top]

Major Threat(s): Habitat loss and degradation (e.g., urbanization and intensive cultivation, conversion of native shrubland to dense grass) have caused local declines, but the species appears to face no major threats over most of the vast range.

Conservation Actions [top]

Conservation Actions: In view of its wide distribution, the species is presumably present within a number of protected areas. No direct conservation measures are currently needed for this species as a whole.
Citation: Hammerson, G.A. 2007. Phrynosoma hernandesi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 16 April 2014.
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