Trimeresurus borneensis (PETERS, 1872)
Can you confirm these amateur observations of Trimeresurus borneensis?
|Higher Taxa||Viperidae, Crotalinae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Borneo Pit Viper|
|Synonym||Atropophis borneensis PETERS 1872|
Atropophis borneensis - MÜLLER 1887
Lachesis borneensis - BOULENGER 1896
Trimeresurus borneensis - BARBOUR 1912
Lachesis puniceus (nec Cophias punicea BOIE 1827) - BOULENGER 1986
Trimeresurus puniceus (partim) - SMITH 1930
Trimeresurus borneensis — WELCH 1994: 113
Trimeresurus borneensis — MANTHEY & GROSSMANN 1997: 408
Trimeresurus borneensis — MCDIARMID, CAMPBELL & TOURÉ 1999: 330
Trimeresurus borneensis — MALHOTRA & THORPE 2004
Trimeresurus borneensis — DAVID et al. 2006
Trimeresurus (Craspedocephalus) borneensis — DAVID et al. 2011
Craspedocephalus borneensis — WALLACH et al. 2014: 187
|Distribution||Indonesia (Kalimantan, Sumatra; Borneo, perhaps other islands); Brunei Darussalam; Malaysia (East Malaysia: Borneo)|
Type locality: “Sarawack” [= Sarawak, Borneo, Malaysia, by implication] Map legend:
- Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
|Types||Syntypes: ZMB 7146, MSNG 8383 (2 specimens)|
"There has been considerable confusion in the literature between Trimeresurus puniceus and the present species [...] We agree with Hoge & Romano (1974) and Toriba (1992) about the validity of this species, which was long considered a synonym of T. puniceus. The morphological differences between the two species are significant and constant enough to warrrant specific distinction (David & Vogel, in prep.)." (David & Vogel, 1996)
Diagnosis. A species of the genus Trimeresurus, endemic to Borneo Island according to the present definition, characterized by the combination of the following characters: (1) an overall grey, brown or ochre pattern with 20–30 darker crossbands, distinctly related to the sex: in males, background colour in various shades of greyish-brown or yellowish- grey, with darker dorsolateral blotches, sometimes horizontally divided into two distinct blotches, separated darker areas and powdered with both cream and dark dots, giving a rather confused pattern; in females, pattern less contrasted, in shades of ochre or yellowhish-brown with more or less brown subrectangular dorsolateral blotches, often with broad darker edges and a wide lighter centre, producing a “saddle-like” pattern; males have a more complex pattern, but are especially much darker than females; (2) a distinctly projected and raised snout, strongly obliquely truncated when seen from the side, subrectangular seen from above; (3) internasals projected, strongly spatulate and bilobate, distinctly upturned; (4) 19 or usually 21 (rarely 20) DSR at midbody; (5) 1st supralabial distinct from nasal; (6) 2nd supralabials bordering the whole of the anterior margin of the loreal pit; (7) 1 to 3 moderate, narrow supraoculars, usually flat, rarely convex; (8) VEN: 149–166, SC: 41–67; (9) occipital and temporal scales distinctly keeled in both sexes in adults, less so in juvenile specimens; (10) IL of the first pair not in contact each with the other; (11) hemipenes short, reaching 11th SC, entirely spinose; and (12) adult females usually light colored [from DAVID et al. 2006].
|Etymology||Named after its distribution on Borneo (Indonesia).|
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