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Caldasia  2011 

DIMORFISMO SEXUAL Y VARIACIóN GEOGRáFICA DE LA SERPIENTE CIEGA Typhlops reticulatus (SCOLECOPHIDIA: TYPHLOPIDAE) Y DISTRIBUCIóN DE OTRAS ESPECIES DEL GéNERO EN COLOMBIA

Keywords: typhlops, blind-snakes, colombia, sexual dimorphism, geographic variation.

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Abstract:

typhlops has a pantropical distribution. due to their fossorial habits, these snakes are poorly represented in collections, making it difficult to take taxonomic data. i verified all colombian collections and registered 56 specimens. only three species of typhlops are known for colombia: typhlops brongersmianus, t. minuisquamus, and t. reticulatus. the geographic distribution of t. brongersmianus and t. minuisquamus are extended to the eastern flank of the oriental cordillera. additional records of t. reticulatus are given. the meristics and quantitative ranges are in agreement with literature data for t. brongersmianus. typhlops minuisquamus has a higher number of total dorsal scales and variation in the dorsal scales formulae than previously reported as in t. reticulatus. i found significant intraspecific differences in the total body length, in which females are greater than males, and a cis- and trans-andean difference in dorsal scale counts. despite exhibiting a distinct geographical variation, it is not possible to argue that the geographically separate populations are independent evolutionary units. future morphological studies including more specimens across the species distribution range are necessary.

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