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Sphaerodactylus becki SCHMIDT, 1919

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Higher TaxaSphaerodactylidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Navassa Geckolet, Beck's Least Gecko 
SynonymSphaerodactylus becki SCHMIDT 1919: 520
Sphaerodactylus becki — SCHWARTZ & HENDERSON 1991: 472
Sphaerodactylus becki — KLUGE 1993
Sphaerodactylus becki — POWELL 1999
Sphaerodactylus becki — RÖSLER 2000: 110 
DistributionNavassa Island

Type locality: Navassa Island.  
TypesHolotype: AMNH 12595. 
DiagnosisDESCRIPTION: Size moderate (SVL in males to 31 mm, in females to 29 mm); an
area of middorsal granules present; dorsals large, acute to cycloid, swollen, almost conical, keeled, imbricate, axilla to groin 28-34; ventrals smooth, cycloid to acute, imbricate, axilla to groin 23-27; dorsal caudal scales acute, swollen, imbricate, flat-lying; ventral caudal scales smooth, cycloid, an enlarged midventral row; snout rather acuminate, not depressed or decurved; snout scales large, granular, swollen, smooth, juxtaposed; 1 postnasal; 1-2 (mode 1) internasals; upper labials to mideye 3-4 (mode 4); central gular scales smooth; chest scales smooth; midbody scales 49-56; escutcheon with small central portion and slender (1-2 scales wide) extensions well onto thighs, 4--6 x 16-27. Dorsum (adults) uniform dark brown, dotted with white because of white centers of dorsal scales; head dull yellow to yellowish brown; tail dull yellow to yellow-brown with dark brown reticulum; venter light gray with varying invasion of dark dorsal pigment; juveniles with light, posterior, U-shaped head pattern formed of postocular stripes
joining on occiput; preocular stripes onto canthus rostralis; body pattern (well-developed in only smallest individuals) of 2 sinuous, light, narrow crossbands, 1 in scapular region, 1 at midbody; light, scalloped, or W-shaped stripe on neck just
behind head; faint throat pattern of light vermiculations present (from Schwartz & Henderson 1991: 472). 
CommentAbundance: only known from the type locality (Meiri et al. 2017). 
EtymologyNamed after Rollo Howard Beck (1870-1950), a collector for the California Academy of Sciences and the American Museum of Natural History. He collected in the Galapagos (1897-1898), Alaska (1911), and New Guinea (1928). 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - 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
  • Powell, R. 1999. Sphaerodactylus becki Schmidt. Catalogue of American Amphibians and Reptiles (697) - get paper here
  • Powell, Robert; José A. Ottenwalder and Sixto J. Incháustegui 1999. The Hispaniolan Herpetofauna: Diversity, Endemism, and Historical Perpectives, with Comments on Navassa Island. In Crother, Caribbean Amphibians and Reptiles, Academic Press, pp. 93-168 - get paper here
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Schmidt, K. P. 1919. Descriptions of new amphibians and reptiles from Santo Domingo and Navassa. Bull. Amer. Mus. Nat. Hist. 41:519-525. - get paper here
  • Schwartz, A. & Henderson, R.W. 1991. Amphibians and Reptiles of the West Indies. University of Florida Press, Gainesville, 720 pp.
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