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Petrosaurus repens (VAN DENBURGH, 1895)

IUCN Red List - Petrosaurus repens - Least Concern, LC

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Higher TaxaPhrynosomatidae, Sceloporinae, Iguania, Sauria, Squamata (lizards)
Subspecies 
Common NamesG: Baja-California-Felsenleguan
S: Lagarto de Roca Hocico Corto 
SynonymUta repens VAN DENBURGH 1895: 102
Uta repens — VAN DENBURGH 1922: 190
Petrosaurus repens — GRISMER 1999
Petrosaurus repens — JUNGNICKEL 2004
Petrosaurus repens — HERNANDEZ-GALLEGOS et al. 2004
Petrosaurus repens — KRACHT 2004
Petrosaurus repens — LINER 2007
Petrosaurus repens — LEMOS-ESPINAL 2015 
DistributionMexico (Baja California, from North of the Isthmus of La Paz, northward to at least Rancho Santa Catarina and Isla Danzante)

Type locality: Commundu, Lower California.  
Reproductionoviparous 
TypesHolotype: CAS 633 
DiagnosisDescription. Head broad, short, and depressed, snout short and truncate. Nostrils large, superior, and much nearer to end of snout than to orbit. Ear-opening large, with anterior denticulation of three pointed scales. Head scales smooth, slightly convex anteriorly. Rostral very broad and low,with a median superior projection. Frontal transversely divided. Largest supraoculars separated from frontals, frontoparietals, and parietals, by two series of small plates. Interparietal very large. Five superior and seven inferior labials to below middle of eye. Several series of enlarged sublabials. Gular region covered with small granules, slightly largest centrally. A weak anterior gular fold followed by a strong posterior fold; latter covered with small subgranular plates, the largest of which, on its edge, are about equal in size to the first scales on chest. Back and sides covered with round granules, larger medially than laterally. Tail somewhat depressed and expanded at its base, and covered with whorls of small weakly keeled scales. Scales on anterior surfaces of limbs large and weakly keeled. Ventral plates larger than caudals (Van Denburgh 1922: 190).

Coloration: The color above is dull grayish olive, with four very distinct anterior, and three duller posterior, transverse black bands. The tail is similarly barred with dusky. The throat is brownish marked with blackish slate centrally. The chest and abdomen are white clouded with slate (Van Denburgh 1922: 190).

P. t. repens has a thin, black, postorbital stripe; one row of scales between the nasal and the supralbials, and reaches a maximum SVL of 111 mm. P. t. thalassinus lacks a postorbital stripe, has two scale rows between the nasals and supralabials, and reaches 162 mm SVL (GRISMER 1999). 
Comment 
EtymologyThe subspecific name repens is from the Latin répere, to creep, which refers to the movements of this lizard in its natural rocky habitat. 
References
  • Aguilars S., M. A.; Sites, J. W., Jr.;Murphy, R. W. 1988. Genetic variability and population structure in the lizard genus Petrosaurus (Iguanidae). Journal of Herpetology 22 (2): 135-145 - get paper here
  • 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
  • Burré, G. 2004. Auf der Suche nach dem Blauen Felsenleguan. Iguana Rundschreiben 17 (1): 25-28
  • Dickhoff, A. 2003. Petrosaurus thalassinus (COPE 1863) - der Blaue Felsenleguan. Reptilia (Münster) 8 (41): 72-79 - get paper here
  • Grismer, L. Lee 1996. Geographic Distribution. Petrosaurus repens. Herpetological Review 27 (3): 153 - get paper here
  • Hernandez-Gallegos, Oswaldo; Casas-Andreu, Gustavo; Rodriguez-Romero, Felipe; Mendez, Fausto R. 2004. Petrosaurus repens (Central Baja California banded Rock Lizard). Scale Variation. Herpetological Review 35 (4):394-395 - get paper here
  • Jennings M R 1990. Petrosaurus Boulenger. Rock lizards. Catalogue of American Amphibians and Reptiles 494: 1-2 - get paper here
  • Jennings, M.R. 1990. Petrosaurus thalassinus. Catalogue of American Amphibians and Reptiles ( 496: 1-3 - get paper here
  • Jones, L.L. & Lovich, R.E. 2009. Lizards of the American Southwest. A photographic field guide. Rio Nuevo Publishers, Tucson, AZ, 568 pp. [review in Reptilia 86: 84] - get paper here
  • Jungnickel, J. 2004. Notizen zur Fortpflanzung des Felsenleguans Petrosaurus repens (VAN DENBURGH, 1895). Sauria, Berlin 26 (2): 3-7 - get paper here
  • Kober, I. & Geissel, U. 2006. Welcher Typ passt zu mir? Die verschiedenen Lampen in der Terraristik. Terraria 1 (1): 17-21
  • Kracht, M. 2004. Erfahrungen bei der Zucht von Petrosaurus repens. Iguana Rundschreiben 17 (2): 14
  • Lemos-Espinal, Julio A. (ed.) 2015. Amphibians and Reptiles of the US - Mexico Border States / Anfibios y Reptiles de los Estados de la Frontera México - Estados Unidos. Texas A&M University Press, College Station, Texas. x + 614 pp.; ISBN 978-1-62349-306-6. - get paper here
  • Leviton, Alan E.; Banta, Benjamin H. 1964. Midwinter reconnaissance of the herpetofauna of the Cape Region of Baja California, Mexico. Proc. Cal. Acad. Sci. 30 (7): 127-156 - 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
  • Schulze Niehoff, Peter 2014. Immer an der Wand lang: Der Baja-California-Felsenleguan, Petrosaurus repens, im Terrarium. Terraria-Elaphe 2014 (2): 38-45 - get paper here
  • Stebbins,R.C. 1985. A Field Guide to Western Reptiles and Amphibians, 2nd ed. Houghton Mifflin, Boston
  • Van Denburgh,J. 1895. A review of the herpetology of Lower California. Part I - Reptiles. Proc. Cal. Acad. Sci. (2) 5: 77-163 - get paper here
 
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