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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.”  
Reproduction 
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.

From the detailed description of the holotype: [...] Neck narrower than body, covered with uniform granular scales with small, sharply pointed and conical tubercles on nape; tubercles on body prominent and conical, long axes directed posteriorly; body tubercles numerous, distributed evenly on dorsum and increasing in size posteriorly from nape to caudal constriction where they terminate; tubercles at caudal constrictions three times larger than those on nape, all exhibiting a sharp and relatively high profile, surrounded by 8-10 and separarated by 2-5 granular scales; average of 41.0 tubercles paravertebrally between centers of limb insertions; strict vertebral row absent. [...] 
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). 
Etymology 
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
  • 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
 
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