Trilepida affinis (BOULENGER, 1884)
Can you confirm these amateur observations of Trilepida affinis?
|Higher Taxa||Leptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes)|
|Common Names||E: Venezuela Blind Snake|
|Synonym||Stenostoma affine BOULENGER 1884: 396|
Glauconia affinis — BOULENGER 1893: 62
Leptotyphlops affinis — AMARAL 1929: 138
Leptotyphlops affinis — MCDIARMID, CAMPBELL & TOURÉ 1999: 19
Rena affinis — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009
Trilepida affinis — NATERA-MUMAW et al. 2015
Trilepida affinis — PINTO & FERNANDES 2017
|Distribution||Venezuela (Tachira, Merida)|
Type locality: Tachira, Venezuela.
|Types||Holotype: BMNH 19220.127.116.11 (formerly BMNH 1818.104.22.168)|
|Diagnosis||Diagnosis. Trilepida affinis can be distinguished from all other congeners by the following combination of characters: (1) snout truncate in dorsal and ventral views, and rounded in lateral view; (2) supraocular present; (3) rostral subtriangular in dorsal view, not reaching the anterior limit of ocular scales; (4) rostral shorter than supranasals; (5) frontal scale longer than other middorsal cephalic shields; (6) frontal longer than supraocular scale; (7) two supralabials (1+1); (8) four infralabials; (9) scales at midtail 10; (10) fused caudals present; (11) middorsals 214; (12) midventrals 202; (13) subcaudals 18; and (14) seven dorsal scales rows brown, contrasting with seven ventral rows cream, and head slightly lighter in dorsal view than body pattern (from Pinto & Fernandes 2017).|
Comparisons. Trilepida affinis differs from T. brasiliensis by having supraocular scales (vs. absent); differs from T. guayaguilensis, T. joshuai, T. macrolepis (rarely), and T. pastusa by having ten scales rows on midtail (vs. 12); differs from T. anthracina, T. dugandi, T. fuliginosa, T. koppesi, T. macrolepis, and T. salgueiroi by having two supralabials (vs. three); differs T. nicefori by having four infralabials (vs. three); differs from T. dimidiata by having snout truncate in dorsal and ventral views (vs. rounded); differs from T. brevissima by having snout rounded on lateral view (vs. obtuse-rounded); differs from T. jani by having frontal scale longer than other middorsal cephalic shields (vs. with similar size). Refers to Table 1 for additional meristic and color differences between congeners (from Pinto & Fernandes 2017).
|Comment||Boulenger (1884) described Stenostoma affinis based on a single specimen from Tachira, without specific locality data, in the Andes of Venezuela.|
Synonymy: Orejas-Miranda 1996, Hoogmoed 1977, Pinto & Fernandes 2017. Wallach et al. (2014) list Stenostoma affinis as synonym of Trilepida macrolepis citing Pinto et al. 2010 as source. However, Pinto et al. 2010 provide a fairly extensive synonymy of T. macrolepis that does not include S. affinis.
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