Urosaurus auriculatus (COPE, 1871)

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Higher Taxa	Phrynosomatidae, Sceloporinae, Iguania, Sauria, Squamata (lizards)
Subspecies
Common Names	E: Socorro Island Tree Lizard S: Arboricola de Isla Socorro
Synonym	Uta auriculata COPE 1871: 303 Uta auriculata — BOULENGER 1885: 214 Urosaurus auriculatus – MITTLEMAN 1942: 163 Urosaurus auriculatus — SMITH & TAYLOR 1950: 146 Urosaurus auriculatus — LINER 1994 Urosaurus auriculatus — LINER 2007 Urosaurus auriculatus — HEIMES 2022
Distribution	Mexico (Colima: Socorro Island, Revillagigedo Island) Type locality: Socorro Island, Revillagigedo Island
Reproduction	oviparous
Types	Holotype: USNM 7027
Diagnosis	Diagnosis: A fairly large member of the genus, unique in the possession of smooth enlarged femorals; two rows of vertebrals, which are rather weakly carinate, imbricate, and regularly arranged, bordered on either side by a single series of enlarged dorsals, which are relatively flat and weakly keeled, and not very regularly dispersed; frontal divided or entire; external to the primary series of enlarged dorsals there are often one or two additional series of irregularly arranged scales which do not continue in even rows, and are of variable size; along the dorsolateral fold a variable series of enlarged scales, some tubercular and others flat and mucronate, these in irregular groups; post-femoral dermal pocket variable; coloration ranging from grayish to bright blue, with six to eight short cross-bars along the dorsum in alternating position, which are light-edged (usually with pale blue) on their posterior borders; light lateral and ventral neckings of pale blue, restricted to single scales, or small groups of tubercular scales; males with extensive deep blue abdominal patches, females with an uneven light blue abdominal wash. Measurements of seven adults, both sexes: head length, 16.5 mm; head width, 12.45 mm; snout to vent, 65.5 mm; hind leg, 44.0 mm (Mittleman 1942: 163). Additional details (38 characters) are available for collaborators and contributors. Please contact us for details.
Comment	Distribution: see map in Feldman et al. 2011.
Etymology	Not given by Cope, but apparently after the “crest of short acute scales on the ridge of the os quadratum above the large tympanum”, from Latin auris = ear and “auricula” = earlobe.
References	Boulenger, G.A. 1885. Catalogue of the lizards in the British Museum (Natural History). Vol. 2, Second edition. London, xiii+497 pp. - get paper here Brattstrom, B.H. 1955. Notes on the herpetology of the Revillagigedo Islands, Mexico. American Midland Naturalist 54(1): 219-229. - get paper here Cope, E.D. 1871. Description of the common lizard of Socorro. Proc. Boston Soc. Nat. Hist. 14: 303-304 Feldman, Chris R.; Oscar Flores-Villela, Theodore J. Papenfuss 2011. Phylogeny, biogeography, and display evolution in the tree and brush lizard genus Urosaurus (Squamata: Phrynosomatidae). Molecular Phylogenetics and Evolution 61 (3): 714-725 - get paper here Heimes, P. 2022. LIZARDS OF MEXICO - Part 1 Iguanian lizards. Edition Chimaira, Frankfurt Am Main, 448 pp. - get paper here Lemos-Espinal JA, Smith GR, Pierce LJS, Painter CW 2020. The amphibians and reptiles of Colima, Mexico, with a summary of their conservation status. ZooKeys 927: 99-125 - get paper here Liner, Ernest A. 2007. A CHECKLIST OF THE AMPHIBIANS AND REPTILES OF MEXICO. Louisiana State University Occasional Papers of the Museum of Natural Science 80: 1-60 - get paper here Mittleman,M.B. 1942. A summary of the iguanid genus Urosaurus. Bull. Mus. Comp. Zool. Harvard 91: 105-181 - get paper here Smith, H.M. & Taylor,E.H. 1950. An annotated checklist and key to the reptiles of Mexico exclusive of the snakes. Bull. US Natl. Mus. 199: 1-253 - get paper here Wiens, J.J. 1993. Phylogenetic systematics of the tree lizards (genus Urosaurus). Herpetologica 49 (4): 399-420 - get paper here ZUG, G.R. 2013. Reptiles and Amphibians of the Pacific Islands. University of California Press, Berkeley, 306 pp. - get paper here
External links	IUCN Red List National Center for Biotechnology Information Google images

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