that he is highly motivated to engage whenever he sees movement on his territory, which he may be interpreting as a possible intruding male, or another female. Systematics The systematics and phylogeny of the side-blotched lizards is very confusing, with many local forms and morphs having been described as full species. Following the 1997 review of Upton and Murphy, which included new data from mtDNA cytochrome b and ATPase 6 sequences, the following species can be recognized pending further research: Enchanted side-blotched lizard, U. encantadae Dead side-blotched lizard, U. lowei Isla San Pedro Nolasco lizard, U. nolascensis San Pedro side-blotched lizard, U. palmeri Isla Santa Catalina side-blotched lizard, U. squamata Common side-blotched lizard, U. stansburiana Western side-blotched lizard, U. (stansburiana) elegans Nevada side-blotched lizard, U. (stansburiana) nevadensis Northern side-blotched lizard, U. (stansburiana) stansburiana Eastern side-blotched lizard, U. (stansburiana) stejnegeri Plateau side-blotched lizard, U. (stansburiana) uniformis Swollen-nosed side-blotched lizard, U. tumidarostra It is also important to note that the side-blotched lizard is different from the common side-blotched lizard. References Collins JT (1991). "Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles". Herpetological Review 22(2): 42-43. PDF fulltext Grismer LL (1994). "Three new species of intertidal side-blotched lizards (Genus Uta) from the Gulf of California, Mexico". Herpetologica 50: 451–474. Murphy, Robert W.; Aguirre-León, Gustavo (2002). "The Nonavian Reptiles: Origins and Evolution". pp. 181-220. In: Case, Ted J.; Cody, Martin L.; Ezcurra, Exequiel (editors) (2002). A New Island Biogeography of the Sea of Cortés. New York: Oxford University Press. 690 pp. . PDF fulltext Appendices 2-4 Oliver JA (1943). "The Status of Uta ornata lateralis Boulenger". Copeia 1943(2): 97-107. (First page image) Pennock, Lewis A.; Tinkle, Donald W.; Shaw, Margery W. (1968). "Chromosome Number in the Lizard Genus Uta (Family Iguanidae)". Chromosoma 24(4): 467-476. PDF fulltext Upton, Darlene E.; Murphy, Robert W. (1997). "Phylogeny of the Side-Blotched Lizards (Phrynosomatidae: Uta) Based on mtDNA Sequences: Support for a Midpeninsular Seaway in Baja California". Mol. Phyl. Evol. 8 (1): 104-113. PDF fulltext Uta Lizards of North America Reptiles of the United States Reptiles of Mexico Lizard genera Taxa named by Spencer Fullerton Baird Taxa named by Charles Frédéric Girard