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Sphaerodactylus richardsonii GRAY, 1845

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Higher TaxaSphaerodactylidae, Gekkota, Sauria, Squamata (lizards: geckos)
SubspeciesSphaerodactylus richardsonii gossei GRANT 1939
Sphaerodactylus richardsonii richardsonii GRAY 1845 
Common NamesE: Northern Jamaica Banded Geckolet, Richardson's Least Gecko 
SynonymSphaerodactylus Richardsoni GRAY 1845:168
Sphaerodactylus richardsonii — BOULENGER 1885: 227
Sphaerodactylus richardsoni — SCHWARTZ & HENDERSON 1991: 527
Sphaerodactylus richardsonii — KLUGE 1993
Sphaerodactylus richardsonii — RÖSLER 2000: 114
Sphaerodactylus richardsoni — WILSON 2011

Sphaerodactylus richardsonii gossei GRANT 1939
Sphaerodactylus richardsonii gossei GRANT 1939: 10
Sphaerodactylus richardsonii gossei — SCHWARTZ & HENDERSON 1988: 190
Sphaerodactylus richardsonii gossei — DE LISLE et al. 2013 
DistributionAntilles, Jamaica

richardsoni: known with certainty only from vicinity of Montego Bay. Type locality: "America"; restricted to Montego Bay, St. James Parish, Jamaica, by Grant, 1939.

gossei: known with certainty only from north coastal region of Jamaica. Altitudinal distribution sea level to 260 ft. Type locality: Mouth of Roaring River, St. Ann Parish, Jamaica.  
Reproductionoviparous 
TypesHolotype: BMNH 1946.8.26.51
Holotype: MCZ 45015 [gossei] 
DiagnosisDESCRIPTION: Size large (SVL in males to 40 mm, in females to 38 mm); dorsals
keeled, imbricate, axilla to groin 15-18; ventrals smooth, cycloid, imbricate, axilla to groin 17-22; dorsal caudal scales keeled, erected, imbricate, acute, ventral caudal scales cycloid, imbricate, enlarged midventrally; snout scales swollen, keeled, juxtaposed; 2 postnasals; 1-2 internasals; midbody scales 29-34. Strongly sexually dichromatic; dorsal ground color (male) reddish brown; dorsum patternless or with scattered black scales; top of head and throat with a broken lineate pattern of vivid greenish sulfur (gossei) or patternless dark gray (richardsoni); limbs faintly ringed; tail alternately ringed yellow and gray (or dark gray and pale gray with yellow cast); throat pale gray between pattern; belly pale yellowish gray to reddish brown; female head. neck. and throat with dark-bordered white stripes; dorsum with 5-6 black-bordered white bands; dorsal markings indistinct or absent approaching venter; throat dark gray to reddish brown between black-bordered light lines; belly pale reddish brown; tail ringed black and white; limbs and digits mayor may not be conspicuously ringed in reddish brown, black, and white; juveniles marked as females, but more vividly (Schwartz & Henderson 1991: 527). 
CommentFor illustrations see Grant, 1940.

The main distinction between S. r. richardsoni and S. r. gossei is the presence of unicolor males in the nominate subspecies versus essentially female-colored males in S. r. gossei. 
References
  • Barbour, T. 1910. Notes on the herpetology of Jamaica. Bull. Mus. Comp. Zool. Harvard 52: 273—301 - get paper here
  • Boulenger, G.A. 1885. Catalogue of the lizards in the British Museum (Nat. Hist.) I. Geckonidae, Eublepharidae, Uroplatidae, Pygopodidae, Agamidae. London: 450 pp. - get paper here
  • Grant, C. 1939. Two new sphaerodactyls from Jamaica. Copeia 1939 (1): 7-13. - get paper here
  • Grant, C. 1940. The herpetology of Jamaica Il. The reptiles. Bull. Inst. Jamaica., Sci. Ser. 1: 61-148.
  • Gray, J. E. 1845. Catalogue of the specimens of lizards in the collection of the British Museum. Trustees of die British Museum/Edward Newman, London: xxvii + 289 pp. - get paper here
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Schwartz, A. & Henderson, R.W. 1991. Amphibians and Reptiles of the West Indies. University of Florida Press, Gainesville, 720 pp.
  • Wilson, Byron S. 2011. Conservation of Jamaican amphibians and reptiles. In: Hailey et al., eds, Conservation of Caribbean Island Herpetofaunas Volume 2: 273-310 - get paper here
 
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