Hebius inas (LAIDLAW, 1901)
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Hebius inas
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| Higher Taxa | Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Malayan Mountain Keelback G: Malayische Bergwassernatter |
| Synonym | Tropidonotus inas LAIDLAW 1901: 576 Natrix inas — SMEDLEY 1931: 115 Natrix inas — TAYLOR 1965: 829 Amphiesma inas — MANTHEY & GROSSMANN 1997: 313 Amphiesma inas — COX et al. 1998: 44 Amphiesma inas — INGER & VORIS 2001 Amphiesma inas — DAVID et al. 2013: 318 Hebius inas — GUO et al. 2014 Amphiesma inas — WALLACH et al. 2014: 30 Amphiesma inas — CHAN-ARD et al. 2015: 231 Hebius inas — DAVID et al. 2021 |
| Distribution | W Malaysia (Perak, Gunung Inas, Pahang: Cameron Highlands), Thailand (Prachuap Khiri Khan, Nakhon Si Thammarat) Type locality: Gunong Inas, Perak [West Malaysia] |
| Reproduction | oviparous |
| Types | Holotype: BMNH? a 397 mm specimen (Laidlaw and Yapp, 1899-1900). |
| Diagnosis | Diagnosis. A species of the genus Amphiesma characterized by the combination of (1) a moderately elongate body; (2) nostrils directed laterally; (3) 19–21 maxillary teeth, gradually enlarged, the last 2 teeth distinctly enlarged; (4) 19 dorsal scale rows at midbody, strongly keeled on upper rows, moderately but distinctly keeled on 1st scale row; (5) dorsal pattern made of a series of yellow or ochre (cream in preservative) dorsolateral spots on a faint dorsolateral stripe (or absent), the first two or three enlarged and connected by a yellow stripe, other also enlarged on the anterior part of the body; (6) each posterior supralabial with a large, elongate, straight or oblique, cream blotch, or scale largely cream; (7) pattern of the neck made of a conspicuous, pale stripe extending from the corner of the mouth to the first enlarged dorsolateral spot; (8) venter ivory or cream, with the outer quarter or third of each ventral dark reddish-brown, in contact with the dorsal colour; (9) eye large, 1.9–2.0 times the distance between the lower margins of eye and of lip; (10) 141–151 VEN, 93–109 SC; (11) internasals abruptly truncated anteriorly, (12) 9 supralabials; and (13) 1 anterior temporal. Amphiesma inas is easily distinguished from A. boulengeri by (1) 2nd to 9th DSR more keeled in A. inas, (2) scales of 1st DSR keeled (vs. smooth in A. boulengeri), and (3) a distinct pattern on posterior supralabials. In contrast, A. inas and A. khasiense are very similar. The most obvious characters for separating these two species are the dorsolateral spots, yellow and conspicuous in A. inas, the first two or three distinctly enlarged and connected by a wavy stripe, small and rather reddish-brown in A. khasiense, and the stripe on the neck, broad in A. inas and connected to the first enlarged dorsal spot, short, narrow or often broken into spots in A. khasiense. (David et al. 2013) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data. However, these details, e.g. detailed descriptions (about between half a page and a page) are available for collaborators and contributors. Please contact us if you need any of this material. |
| Comment | Amphiesma inas in CHAN-ARD et al. 1999 is a member of the sauteri group fide DAVID & PAUWELS (2000, Russ. J. Herp. 7: 89). Distribution: not on Borneo fide David et al. 2013 where it has been confused with Hebius kerinciensis. |
| Etymology | The species epithet, inas, is a reference to the type locality [Gunung Inas]. |
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