Dipsas pratti (BOULENGER, 1897)
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Dipsas pratti
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Pratt's Snail-eater |
| Synonym | Leptognathus pratti BOULENGER 1897: 523 Leptognathus triseriatus COPE 1899: 309 Leptognathus nigriceps WERNER 1916: 310 Leptognathus nigriceps — WERNER 1924: 46 Dipsas niceforoi PRADO 1940: 14 Dipsas tolimensis PRADO 1941: 345 Dipsas pratti — PETERS 1960: 112 Dipsas pratti — PETERS & OREJAS-MIRANDA 1970: 89 Dipsas pratti — HARVEY 2008 Dipsas pratti — WALLACH et al. 2014: 234 Dipsas cf. pratti — ACUÑA-VARGAS 2016 |
| Distribution | Colombia (Antioquia, Santander, Bolívar, Valle del Cauca), Venezuela (Zulia) Type locality: Medellin, Colombia |
| Reproduction | oviparous |
| Types | Holotype: BMNH 1946.1.20.52, formerly 97.11.12.19 (BARROS et al. 2012) Holotype: AMNH 17525 [Leptognathus triseriatus] Holotype: MLS 165 [Dipsas niceforoi] |
| Diagnosis | Diagnosis: Dipsas pratti is a robust snake of the tribe Dipsadini defined by the following characters: (1) dorsal scale rows 15 – 15 – 15; (2) temporals excluded from the orbit by postoculars; (3) two pairs of infralabials in contact behind the mental; (4) infralabials broadly contacting first and second pairs of chinshields, sublabials separating infralabials from preventrals and ventrals; (5) loreal variable, though more specimens exhibit loreals that are longer than high or slightly square and occasionally higher than long ,entering orbit; (6) preocular present above loreal, excluding prefrontal from orbit; (7) dorsal surface of head uniform brown in adults, young specimens with some yellow marks on the cephalic scales; (8) labial scales heavily pigmented yellow both in adults and juveniles, young specimens with a narrow yellow bar extending from behind the eyes to the last supralabials; (9) nuchal collar absent in adults, but present in young specimens; (10) usually fewer than 30 bands with or without lighter centers but rarely resembling paired ellipses, first band without contacting parietals; (11) bands complete in young specimens, however in adults and old specimens only the faint narrow yellow line can be observed on either side of the diffuse bands; (12) interspaces brown but lighter than the bands; (13) venter uniform grey brown; (14) ventrals, excluding preventrals, 175 – 181 in males, 167 – 176 in females; (15) subcaudals 75 – 81 in males, 62 – 75 in females, although Harvey (2008) reports 60 – 89 for the species; (16) maxillary teeth more than 15 [see Tables 1 – 2 as well as descriptions of D. pratti in Harvey (2008) and Harvey & Embert (2008)] [from BARROS et al. 2012]. |
| Comment | Synonymy mostly after PETERS & OREJAS-MIRANDA 1970. Four species of Dipsas were described (by Cope 1899; Prado 1940, 1941; Werner 1916) and were found to be juveniles of D. pratti (the differences reported only reflected ontogenetic changes, Peters 1960). Conservation: known from only 13 specimens (including the holotype) [BARROS et al. 2012]. Habitat: fully arboreal (Harrington et al. 2018). Similar species: D. sanctijoannis; the D. pratti specimen (MHUA 14278) cited by Daza et al. (2009, 2010) and Pyron et al. (2011) is D. sanctijoannis (J. M. Daza, pers. comm., cited in Barros et al. 2012) |
| Etymology | Named after Antwerp Edgar Pratt (ca. 1850-ca. 1920), an explorer and naturalist, as were his sons, Felix and Charles. |
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