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Phrynosoma coronatum, Coast Horned Lizard
Dr. Wendy Hodges - University of California at Riverside
Phrynosoma coronatum
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Los Angeles County Museum of Natural History (LACM 138354)

Image processing: Ms. Megan Demarest
Publication Date: 15 Oct 2003


Phrynosoma coronatum, the coast horned lizard, ranges from central California west of the Sierra Nevada, south throughout southern California west of the Mojave Desert, throughout Baja California west of the Sierra Juarez and Sierra San Pedro Martir, Mexico. P. coronatum can be distinguished from other horned lizard species by the following: two rows of lateral abdominal fringe scales; two occipital spines, 3-4 times longer than basal width, not in contact; 4-5 temporal spines; smooth ventral scales; three or more rows of enlarged gular scales.

About the Species

This specimen (LACM 138354) was collected by RRM and Robert Montanucci 4.0 miles east of California Highway 33, Ventura County, California. It was made available to the University of Texas High-Resolution X-ray CT Facility for scanning by Dr. Wendy Hodges of the Department of Biology, University of California, Riverside. Funding for scanning was provided by a National Science Foundation grant (DBI-0204459) to Dr. Hodges. Funding for image processing was provided by a National Science Foundation Digital Libraries Initiative grant to Dr. Timothy Rowe of the Department of Geological Sciences, The University of Texas at Austin.

Dorsal view of specimen

Dorsal view of head

Lateral view of head

About this Specimen

The specimen was scanned by Matthew Colbert on 22 May 2003 along the coronal axis for a total of 783 slices, each slice 0.036 mm thick with an interslice spacing of 0.036 mm.

About the


Frost, D. R., and R. Etheridge. 1989. A phylogenetic analysis and taxonomy of iguanian lizards (Reptilia: Squamata). University of Kansas Museum of Natural History Miscellaneous Publication 81.

Pianka, E. R., and W. S. Parker. 1975. Ecology of horned lizards: A review with special reference to Phrynosoma platyrhinos Copeia 1975:141-162.

Presch, W. 1969. Evolutionary osteology and relationships of the horned lizard genus Phrynosoma (Family Iguanidae) Copeia 1969:250-275.

Reeve, W. L. 1952. Taxonomy and distribution of the horned lizard genus Phrynosoma. University of Kansas Science Bulletin 34:817-960.

Smith, H. M. 1946. Handbook of Lizards: Lizards of the United States and of Canada. Comstock Publishing Co., Ithaca, New York.


More on horned lizards from Eric Pianka and Wendy Hodges

Phrynosoma coronatum on the USGS Western Ecological Research Center site

P. coronatum in the San Diego Natural History Museum Field Guide

Images of P. coronatum from californiaherps.com

The Horned Lizard Conservation Society

& Links

None available.


To cite this page: Dr. Wendy Hodges, 2003, "Phrynosoma coronatum" (On-line), Digital Morphology. Accessed July 22, 2024 at http://digimorph.org/specimens/Phrynosoma_coronatum/.

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