Uta stansburiana 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Squamata Phrynosomatidae

Scientific Name: Uta stansburiana Baird & Girard, 1852
Common Name(s):
English Common Side-blotched Lizard, Side-blotched Lizard
Uta concinna Dickerson, 1919
Uta mannophora Dickerson, 1919
Uta stansburiana ssp. stejnegeri Schmidt, 1921
Taxonomic Notes: See Upton and Murphy (1997) for a phylogeny of Uta based on mtDNA sequences. These data suggest that U. stansburiana from the islands of Angel de la Guarda, Mejia, and Raza should be recognized as a distinct species. However, Grismer (2002) retained these populations in U. stansburiana.

Subspecies stejnegeri (southeastern Arizona to western Texas and southward into north-central Mexico) was proposed as a distinct species by Collins (1991), but Collins did not present supporting data. Stebbins (2003) did not recognize any subspecies.

We follow Grismer (2002) in considering animals on Isla Cedros, formerly considered to be an endemic species U. concinna, as belonging to U. stansburiana.

We follow Grismer (2002) by assigning populations of Uta from Carmen, Danzante, and Coronado Islands in the Gulf of California to the name Uta stansburiana, rather than to the name Uta mannophora Dickerson, 1919, which is presumably a synonym of Uta stansburiana.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Needs updating
Assessor(s): Hammerson, G.A., Frost, D.R. & Santos-Barrera, G.
Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Listed as Least Concern in view of the large and stable extent of occurrence, area of occupancy, number of subpopulations, and population size. No major threats are known.

Geographic Range [top]

Range Description:The geographic range extends from central and northeastern California, central and eastern Oregon, central Washington, southwestern Idaho, Utah, and western Colorado southward to the tip of Baja California, northern Sinaloa, and northern Zacatecas, Mexico, including many islands along the Pacific coast of Baja California and in the Gulf of California (Grismer 2002, Stebbins 2003). Elevational range extends from below sea level in desert sinks to about 2,750 m (9,000 feet) (Stebbins 2003).
Countries occurrence:
Mexico; United States
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This lizard is represented by a very large number of occurrences or subpopulations. The total adult population size is unknown but surely exceeds 1,000,000. The extent of occurrence, area of occupancy, number of subpopulations, and population size are large and relatively stable.
Current Population Trend:Stable
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Habitats include a wide variety of arid and semi-arid situations with scattered bushes and/or scrubby trees; soil may be sandy, gravelly, or rocky; the species is often found in sandy washes with scattered rocks and bushes (Stebbins 2003). Eggs are buried in sandy soil (Nussbaum et al. 1983).

Threats [top]

Major Threat(s): No major threats have been identified.

Conservation Actions [top]

Conservation Actions: The species occurs in many protected areas, such as national parks, monuments, and wilderness areas. No direct conservation measures are currently needed for this species as a whole.

Classifications [top]

3. Shrubland -> 3.4. Shrubland - Temperate
3. Shrubland -> 3.5. Shrubland - Subtropical/Tropical Dry
3. Shrubland -> 3.8. Shrubland - Mediterranean-type Shrubby Vegetation
8. Desert -> 8.1. Desert - Hot
8. Desert -> 8.2. Desert - Temperate

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education

Bibliography [top]

Alvarez-Cárdenas, S., Gallina-Tessaro, P. and González, A. 1988. Herpetofauna. In: A. Arriaga and A. Ortega (eds), La Sierra de la Laguna de Baja California Sur, pp. 167-184. Centro de Investigaciones Biológicas de Baja California Sur A.C., La Paz, Baja California Sur.

Asplund, K.K. 1967. Ecology of lizards in the relictual cape flora, Baja California. American Midland Naturalist 77: 462-475.

Ballinger, R.E. and Tinkle, D.W. 1972. Systematics and evolution of the genus Uta (Sauria: Iguanidae). Miscellaneous Publications of the Museum of Zoology, University of Michigan 145: 1-83.

Blázquez, M.C. and Ortega-Rubio, A. 1996. Lizard winter activity at Baja California Sur, Mexico. Journal of Arid Environments 33: 247-253.

Case, T.J. 1983. The reptiles. In: T.J. Case and M.L. Cody (eds) Island Biogeography in the Sea of Cortez, pp. 159-209. University of California Press, Berkeley, California.

Collins, J.T. 1991. Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles. SSAR Herpetological Review 22(2): 42-43.

Dickerson, M.C. 1919. Diagnoses of twenty-three new species and a new genus of lizards from Lower California. Bulletin of the American Museum of Natural History 41(10): 461-477.

Grismer, L.L. 1993. The insular herpetofauna of the Pacific coast of Baja California, Mexico. Herpetological Natural History 1: 1-10.

Grismer, L.L. 1994. Ecography of the peninsula herpetofauna of Baja California, Mexico, and its utility for historical biogeography. In: J.W. Wright and P. Brown Proceedings of the Conference on Herpetology of North American Deserts, pp. 89-125. Southwest Herpetological Society Special Publication No. 5, Van Nuys, California.

Grismer, L.L. 1994. The origin and evolution of the peninsular herpetofauna of Baja California, Mexico. Herpetological Natural History 2: 51-106.

Grismer, L.L. 1999. An evolutionary classification of reptiles on islands in the Gulf of California, México. Herpetologica 55(4): 446-469.

Grismer, L.L. 1999. Checklist of amphibians and reptiles on islands in the Gulf of California. Bulletin of the Southern California Academy of Sciences 98(2): 45-56.

Grismer, L.L. 2001. An evolutionary classification and checklist of amphibians and reptiles on the Pacific islands of Baja California, Mexico. Bulletin of the Southern California Academy of Sciences 100: 12–23.

Grismer, L.L. 2002. Amphibians and Reptiles of Baja California, Including its Pacific Islands and the Islands in the Sea of Cortés. University of California Press, Berkeley and Los Angeles, California.

IUCN. 2007. 2007 IUCN Red List of Threatened Species. Available at: (Accessed: 12th September 2007).

Leviton, A.E. and Banta, B.H. 1964. Midwinter reconnaissance of the herpetofauna of the Cape Region of Baja California, Mexico. Proceedings of the California Academy of Science, 4th series 30: 127-156.

Murray, K.F. 1955. Herpetological collections from Baja California. Herpetologica 11: 33-48.

Nussbaum, R.A., Brodie Jr., E.D. and Storm, R.M. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho. 332 pp.

Stebbins, R.C. 2003. A Field Guide to Western Reptiles and Amphibians. Third Edition. Houghton Mifflin Company, Boston, Massachusetts.

Upton, D.E. and Murphy, R.W. 1997. Phylogeny of the side-blotched lizards (Phrynosomatidae: Uta) based on mtDNA sequences: support for midpeninsular seaway in Baja California. Molecular Phylogenetics and Evolution 8(1): 104-13.

Welsh, H.H. 1988. An ecogeographic analysis of the herpetofauna of the Sierra San Pedro Martir region, Baja California with a contribution to the biogeography of the Baja California herpetofauna. Proceedings of the California Academy of Science, 4th series 46: 1-72.

Citation: Hammerson, G.A., Frost, D.R. & Santos-Barrera, G. 2007. Uta stansburiana. The IUCN Red List of Threatened Species 2007: e.T64180A12744259. . Downloaded on 22 July 2018.
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