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Coleonyx gypsicolus GRISMER & OTTLEY, 1988

IUCN Red List - Coleonyx gypsicolus - Least Concern, LC
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Higher TaxaEublepharidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: ISLA SAN MARCOS BAREFOOT BANDED GECKO
S: SALAMANQUESA 
SynonymColeonyx switaki gypsicolus GRISMER & OTTLEY 1988
Coleonyx gypsicolus — GRISMER 1999
Coleonyx gypsicolus — SEUFER ET AL. 2005
Coleonyx gypsicolus — JONES & LOVICH 2009 
DistributionMexico (Gulf of California: Isla San Marcos)

Type locality: “Arroyo de la Taneria, Isla San Marcos, Baja California Sur, Mexico.”  
Reproductionoviparous (manual imputation, fide Zimin et al. 2022) 
TypesHolotype: BYU 37643 
DiagnosisDiagnosis: Coleonyx switaki gypsicolus differs from all other C. switaki in its signiicantly higher mean number of postnasals; eyelid fringe scales; scales a top of head; scales around forearm, body, foreleg, and tail; bright yellow groundcolor, break up of anterior 2-3 black caudal bands to form spots, and prominent vertebral stripe. It differs further from the San Diego and Imperial Co. populations in its significantly higher mean number of precloacal scales and tubercles at midline and larger spots on the regenerated tail. It differs further from the Tres Virgenes populations in its significantly lower mean number of postmentals, significantly higher mean number of gulars, mottled ground color, and less well-defined dorsal spots. It is differentiated further from the San Diego Co. population in its significantly higher mean number of preoculars. 
CommentGrismer (1999) elevated gypsicolus to full species status based on scale counts: it has 42-48 eyelid fringe scales versus 32-40 in Coleonyx switaki switaki.

Abundance: only known from its original description (Meiri et al. 2017). 
References
  • Crother, B. I. (ed.) 2012. Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians, Seventh Edition. Herpetological Circular 39: 1-92
  • Fritts, T. H.;Snell, H. L.;Martin, R. L. 1982. Anarbylus switaki Murphy: an addition to the herpetofauna of the United States with comments on relationships with Coleonyx. Journal of Herpetology 16 (1): 39-52 - get paper here
  • Grismer L L 1990. Coleonyx switaki (Murphy). Barefoot banded gecko. Catalogue of American Amphibians and Reptiles (464): 1-2 - get paper here
  • Grismer, L. L., and J. R. Ottley. 1988. A preliminary analysis of geographic variation in Coleonyx switaki (Squamata: Eublepharidae) with a description of an insular subspecies. Herpetologica 44: 143—154 - get paper here
  • Grismer, L. Lee. 1999. An evolutionary classification of reptiles on islands in the Gulf of California, México. Herpetologica 55 (4): 446-469 - 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
  • 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
  • Murphy, R. W. 1974. A new genus and species of eublepharine gecko (Sauria: Gekkonidae) from Baja California, Mexico. Proc. Cal. Acad. Sci. 40:87-92 - get paper here
  • Peralta-García A, Valdez-Villavicencio JH, Fucsko LA, Hollingsworth BD, Johnson JD, Mata-Silva V, Rocha A, DeSantis DL, Porras LW, and Wilson LD. 2023. The herpetofauna of the Baja California Peninsula and its adjacent islands, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 17(1&2): 57–142
  • Pianka, E.R. & Vitt, L.J. 2003. Lizards - Windows to the Evolution of Diversity. University of California Press, Berkeley, 347 pp. [review in Copeia 2004: 955] - get paper here
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Seufer, H.; Y. Kaverkin & A. Kirschner (eds.) 2005. Die Lidgeckos. Kirschner und Seufer Verlag, 238 pp.
  • Stebbins,R.C. 1985. A Field Guide to Western Reptiles and Amphibians, 2nd ed. Houghton Mifflin, Boston
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
 
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