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Urosaurus clarionensis (TOWNSEND, 1890)

IUCN Red List - Urosaurus clarionensis - Vulnerable, VU

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Higher TaxaPhrynosomatidae, Sceloporinae, Iguania, Sauria, Squamata (lizards)
Common NamesE: Clarion Island Tree Lizard
S: Arboricola de Isla Clarion 
SynonymUta clarionensis TOWNSEND 1890
Urosaurus clarionensis — MITTLEMAN 1942: 149
Urosaurus clarionensis — SMITH & TAYLOR 1950: 142
Urosaurus clarionensis — LINER 1994
Urosaurus clarionensis — LINER 2007 
DistributionMexico (Colima: Clarion Island)

Type locality: Clarion Island, Revillagigedo Islands, Mexico [belonging to Colima]  
TypesSyntypes: USNM 15904-15908 
DiagnosisDiagnosis: Enlarged dorsals strongly carinate, prominently imbricate, and very regularly dispersed in two parallel series on either side of a series of very small vertebrals which commence on the nape; scales of primary series well developed, and slightly larger than those of the secondary series; largest of the dorsals considerably larger than the enlarged femorals anchor tibials; dorsolateral tubercles very well developed, as are those of the lateral fold; between the dorsolateral tubercles and the lateral fold are short series of tubercles which occasionally present a diagonal arrangement; frontal transversely divided; lateral abdominal scales mucronate and carinate (Mittleman 1942: 149).

Coloration (alcoholic) of male: general over-all color blue above and below; limbs and tail lightly ringed with gray or black; dorsum with longitudinal dark streaks (Mittleman 1942: 149).

Size of six adults (three of each sex): head length, 13.78; head width, 10.55 mm; snout to vent, 54.50 mm; hind leg 41 mm (Mittleman 1942: 149). 
CommentDistribution: see map in Feldman et al. 2011.

Abundance: only known from the type locality (Meiri et al. 2017). 
EtymologyNamed after the type locality. 
  • Brattstrom, B. H. 1990. Biogeography of the Islas Revillagigedo, Mexico. J. Biogeography 17: 177-183 - 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
  • 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
  • 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
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - 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
  • Townsend, C.H. 1890. Scientific results of explorations by the U.S. Fish Commission Steamer Albatross. No. XV.-Reptiles from Clarion and Socorro Islands and the Gulf of California, with description of a new species. Proc. US Natl. Mus. 13: 143-144 - get paper here
  • Wiens, J.J. 1993. Phylogenetic systematics of the tree lizards (genus Urosaurus). Herpetologica 49 (4): 399-420 - get paper here
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