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Sphenomorphus rarus MYERS & DONNELLY, 1991

IUCN Red List - Sphenomorphus rarus - Data Deficient, DD
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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common Names 
SynonymSphenomorphus rarus MYERS & DONNELLY 1991
Sphenomorphus rarus — KÖHLER 2000: 93
Sphenomorphus rarus — KÖHLER 2008: 165
Scincella rarus — LINKEM, DIESMOS & BROWN 2011
Scincella rarus — LOTZKAT 2014: 501 
DistributionW Panama

Type locality: SW headwaters of Río Guabo, 780 m elevation, 8° 47’ W, 82° 11’ W, Bocas del Toro, Panama.  
Reproduction 
TypesHolotype: AMNH 129836 
DiagnosisDiagnosis: A medium-sized (SVL of holotype 52 mm) skink that is distinguished from the skink-like anguids (genera Celestus and Diploglossus) and gymnophthalmids (genera Gymnophthalmus and Bachia), as well as the skink Marisora unimarginata by the same characters as Scincella cherriei. The species differs from its only Panamanian congener in lacking prefrontals, thus exhibing a broad contact between the frontal and frontonasal plates, the latter of which has a markedly concave posterior border (vs. PF 2, narrow contact between frontal and FN along a rather straight portion of the otherwise convex posterior border of the latter), and in having only 11 subdigital lamellae under the 4th toe and 7 under the 4th finger (vs. 4th toe 13 or more, 4th finger 9 or more), among others. (Lotzkat 2014)


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CommentSynonymy: Scincella rarus (MYERS & DONNELLY 1991) is a homonym of Scincella rara (DAREVSKY & ORLOV 1997).

Abundance: Rare. This is one of the species called 'lost' and 'rediscovered' by Lindken et al. 2024. 
EtymologyNamed after Latin rarus, few, infrequent; rare; in small groups. [“...The species name is a Latin adjective alluding to the rarity of this new lizard, known from a single specimen...”]. 
References
  • Köhler, G. 2000. Reptilien und Amphibien Mittelamerikas, Bd 1: Krokodile, Schildkröten, Echsen. Herpeton Verlag, Offenbach, 158 pp.
  • Köhler, G. 2008. Reptiles of Central America. 2nd Ed. Herpeton-Verlag, 400 pp.
  • Lindken T.; Anderson, C. V., Ariano-Sánchez, D., Barki, G., Biggs, C., Bowles, P., Chaitanya, R., Cronin, D. T., Jähnig, S. C., Jeschke, J. M., Kennerley, R. J., Lacher, T. E. Jr., Luedtke, J. A., Liu, C., Long, B., Mallon, D., Martin, G. M., Meiri, 2024. What factors influence the rediscovery of lost tetrapod species? Global Change Biology, 30: 1-18 - get paper here
  • Lotzkat, Sebastian 2014. Diversity, taxonomy, and biogeography of the reptiles inhabiting the highlands of the Cordillera Central (Serranía de Talamanca and Serranía de Tabasará) in western Panama. PhD thesis, Goethe-Universität Frankfurt am Main, 930 pp. - get paper here
  • Myers, C W. Donnelly M A. 1991. The lizard genus Sphenomorphus (Scincidae) in Panama with description of a new species. American Museum Novitates (3027): 1-12. - get paper here
 
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