Dipsas pratti (BOULENGER, 1897)
Can you confirm these amateur observations of Dipsas pratti?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||Pratt's Snail-eater|
|Synonym||Leptognathus pratti BOULENGER 1897: 523|
Leptognathus triseriatus COPE 1899: 309
Leptognathus nigriceps WERNER 1916: 310
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
|Distribution||Colombia (Antioquia, Santander, Bolívar, Valle del Cauca), Venezuela (Zulia)|
Type locality: Medellin, Colombia
|Types||Holotype: BMNH 1918.104.22.168, formerly 22.214.171.124 (BARROS et al. 2012)|
Syntype: AMNH 17525
|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 con- tacting first and second pairs of chinshields, sublabials separating infralabials from preventrals and ventrals; (5) loreal variable, though more specimens exhibit lor- eals 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 spe- cimens, 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].
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