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Image References

http://www.ribbitphotography.com
John Sullivan/Ribbit Photography
(P. hernandesi hernandesi on Home page and Natural History page, P. coronatum)

 

http://digimorph.org/specimens/Phrynosoma_cornutum/whole/
Dr. Wendy Hodges -University of California at Riverside
(phrynosoma cornutum skeleton)

 

http://www.zoology.uwa.edu.au/staff/rblack/12032003.html
University of Western Australia
Photo by Phil Withers
(Moloch horridus photo)

 

http://www.werc.usgs.gov/fieldguide/phco.htm
Photos by Chris Brown
Western Ecological Research Center, San Diego Field Station
(Phrynosoma coronatum, on home page. Natural History Page: P. coronatum, P. platyrhinos)

 

http://digimorph.org/resources/horned.phtml
Wendy Hodges
(P. cornutum, Phrynosoma skulls)

 

http://www.arts.arizona.edu/herp/PHMO.html
Photos by Erik F. Enderson
Tuscon Herpetological Society
(P. modestum, P. cornutum, P. hernandesi, P. platyrhinos, copulating P. platyrhinos, and P. solare photos)

 

http://www.californiaherps.com/lizards/pages/p.d.douglasii.html
Photos by G. Nafis
California Herps
(P. douglasii, P. coronatum, and P. mcallii photos)

 

Range maps from Stebbins (see Text References below).

 

Text References:

Stebbins, Robert C. Western Reptiles and Amphibians, Third Edition. New York: Houghton Mifflin Company, 2003.

Pough, F. Harvey et al. Herpetology, Third Edition. London: Pearson Education Ltd., 2004.

Barry Sinervo's herpetology lectures. 1/6/2004-2/12/2004.

Blood-Squirting Variability in Horned Lizards (Phrynosoma). Wade C. Sherbrooke and George A. Middendorf III, pages 1114-1122.
2001 by the American Society of Ichthyologists and Herpetologists

Reproductive mode and female reproductive cycles of two endemic Mexican horned lizards (Phrynosoma taurus and Phrynosoma braconnieri). Copeia [0045-8511] Zamudio. yr: 2000 iss: 1 pg: 222
(Phylogeny modified from this paper)

James, Janice D. A Survey of Short-Horned Lizard (Phrynosoma hernandesi hernandesi) Populations in Alberta. Alberta Species at Rist Report No. 29. January 2002.

 

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