Trilepida dimidiata (JAN, 1861)
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Trilepida dimidiata
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| Higher Taxa | Leptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Dainty Blind Snake Portuguese: Cobra-Cega |
| Synonym | Stenostoma dimidiatum JAN 1861: 188 Glauconia dimidiata — BOULENGER 1893: 64 Leptotyphlops dimidiata — AMARAL 1929: 76 Leptotyphlops dimidiatus — OREJAS-MIRANDA 1967 Leptotyphlops dimidiatus — MCDIARMID, CAMPBELL & TOURÉ 1999: 27 Rena dimidiata — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009 Tricheilostoma dimidiatum — PINTO & FERNANDES 2012 Tricheilostoma dimidiatum — COLE et al. 2013 Trilepida dimidiata — WALLACH et al. 2014: 738 Trilepida dimidiatum — FELDMAN et al. 2015 Trilepida dimidiata — NOGUEIRA et al. 2019 |
| Distribution | Guyana, Suriname, N Brazil, SE Venezuela ? Type locality: Brazil, restricted by PETERS & OREJAS MIRANDA (1970:169) to San Marcos, near confluence of Rios Uriracuera and Tacutu, both tributaries of Rio Branco, Territorio de Roraima, Brazil; neotype locality: Brazil, State of Roraima, Boa Vista Municipality, São Marcos, 03°05’N, 60°25’W, elevation 75 m. |
| Reproduction | oviparous |
| Types | Neotype: IBSP 24011, adult female, Alphonse Richard Hoge expedition, 27 May 1964. Holotype: MSNM. - destroyed (according to HAHN 1980) |
| Diagnosis | Diagnosis: Tricheilostoma dimidiatum can be distinguished from other congeneric species by the following combination of characters: snout rounded in dorsal and ventral views, obtusely rounded in lateral view; supraocular present; ocular subhexagonal with anterior border slightly rounded at eye level and superior border straight; rostral subtriangular in dorsal view, not reaching (67%) or reaching (33%) anterior border of ocular scales; frontal longer than other middorsal cephalic shields, slightly smaller than supraocular; temporal not distinct (74%) or distinct (26%); two supralabials (1+1); four infralabials; robust body width (43.1 6 8.9); 198–215 middorsal in females and 191–214 in males; 185–200 ventral in females and 175–197 in males; 13–16 subcaudal in females and 12–18 in males; fused caudals present; 10 scales around middle of tail; and seven dorsal scales rows with pale brown pigmentation in contrast with seven unpigmented ventral rows that are cream [from PINTO & FERNANDES 2012]. |
| Comment | Not listed by GASC & RODRIGUES 1980. Synonymy: WALLACH et al. 2014: 724 list this species under Trilepida without justification. They cite Pinto 2010 but that paper neither mentions Trilepida nor dimidiatum. Distribution: Not listed for French Guiana by STARACE 1998. The first mention of the species in Venezuela was apparently by Lancini (1979), who based the record on Orejas-Miranda (1966, 1969) and cited the species from the country with no voucher mentioned. Hence, RIVAS et al. 2012 do not include it in their list of Venezuelan reptiles although most likely it occurs there. See map in Nogueira et al. 2019. |
| Etymology | Named after Latin dimidiata, halved, divided in half. (Esteban Lavilla, pers. comm., April 2024) |
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