Dipsas pakaraima MACCULLOCH & LATHROP, 2004
Can you confirm these amateur observations of Dipsas pakaraima?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Dipsas pakaraima MACCULLOCH & LATHROP 2004|
Dipsas pakaraima — WALLACH et al. 2014: 233
|Distribution||Guyana (Mt. Ayanganna)|
Type locality: NE plateau of Mt. Ayanganna 5°24' N, 59°57' W, 1490 m elevation, Guyana.
|Types||Holotype: ROM 41233, adult male collected on 31 October 2000, by Roland Edward.|
|Diagnosis||Diagnosis: A member of the genus Dipsas characterised by 15 dorsal scale rows, the mid-dorsal row slightly enlarged; four pairs of chin-shields, the first pair elongate; elongate loreal entering orbit; one preocular; six upper labials, with only one elongate upper labial posterior to those that enter the orbit; head narrow anteriorly, increasing in width posteriorly; eye visible from below. The new species can be referred to Dipsas because it possesses the following suite of characters: head distinct from neck; mental groove absent; tertiary temporals present; four pairs chinshields; posterior chinshields separated from lower labials by other scales; maxillary teeth angled inwards; pterygoids parallel, not diverging posteriorly; occurring in northern South America (Peters 1960).|
Dipsas pakaraima can be distinguished from D. catesbyi by its 15 dorsal scale rows (13 in D. catesbyi), six upper labials (8-9), loreal entering orbit (not); from D. copei by four pairs of chinshields (three in D. copei), six upper labials (10-11), loreal entering orbit (not); from D. indica and D. pavonina by 15 scale rows (13 in D. indica and D. pavonina), six upper labials (9-11), four pairs of chin-shields (three); from D. variegata by one preocular (none in D. variegata), six upper labials (7-10), four pairs of chinshields (two or three). No other described species of Dipsas occurs in the Guiana region.
|Comment||Habitat: fully arboreal (Harrington et al. 2018).|
|Etymology||The specific epithet refers to the Pakaraima Mountains of western Guyana, where the type locality is located. It is used as a noun in apposition.|