Hebius chapaensis (BOURRET, 1934)
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Hebius chapaensis
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| Higher Taxa | Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Vietnam Water Snake Chinese: 沙坝腹链蛇 |
| Synonym | Pararhabdophis chapaensis BOURRET 1934: 131 Pararhabdophis chapaensis — SMITH 1943: 316 Pararhabdophis chapaensis — NGUYEN et al. 2009 Pararhabdophis chapaensis — WALLACH et al. 2014: 533 Hebius chapaensis — KIZIRIAN et al. 2018 Hebius chapaensis — REN et al. 2018 Hebius chapaensis — DAVID et al. 2021: 23 |
| Distribution | Vietnam (Lao Cai, Yen Bai, Cao Bang, Dien Bien, Son La, Thanh Hoa), China (Yunnan), Laos (Houaphan, Luangphrabang, Xaisomboun, Vientiane) Type locality: Chapa, Tong-King (= Sa Pa, Lao Cai Province, North Vietnam) |
| Reproduction | |
| Types | Holotype: MNHN-RA 1938.0125 |
| Diagnosis | Diagnosis: A moderately sized species of the genus Hebius characterized by the combination of (1) a body elongate in both sexes; (2) head distinct from the neck; (3) 17–18 (rarely 19)-17-17 dorsal scale rows, distinctly keeled at midbody, strongly keeled posteriorly, especially before vent but smooth or feebly keeled on the 1st dorsal scale row; (4) scales around the base of the tail very strongly keeled; (5) eye average with a pupil variable in shape, i.e., usually round but also elliptic or even asymmetrically and irregularly shaped, 1.0–1.2 times the distance be- tween the lower margins of eye and of lip; (6) 29–34 maxillary teeth, progressively increasing in size in a continu- ous series, the last two or three abruptly and strongly enlarged, not separated from anterior teeth by a diastema; (7) nostrils piercing laterally or slightly dorsolaterally; (8) tail long but with a ratio Tal/TL lower than 0.30; (9) 159–177 VEN; (10) 90–114 subcaudals, paired; (11) internasals abruptly truncated; (12) 2 prefrontal scales, (13) 1 anterior temporal, (14) venter dark, blackish-brown or black, with some paler, more or less faint longitudinal streaks and sometimes a pale blotch or streak on the outer margin of ventrals; (15) background colour dark brown or blackish- brown; (16) dorsal pattern made of more or less elongate cream, pale yellow or pale orange-brown blotches on a faint dorsolateral stripe; (17) an elongate, cream or pale ochre-yellow blotch, or isolated blotches on the nape; (18) a strong postocular streak; (19) upper head surface with strong, yellow vermiculations; and (20) supralabials cream, ochre-yellow or pale yellowish-brown, edged with dark brown, or divided into a pale and dark area (David et al. 2021). Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 2352 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Type species: Pararhabdophis chapaensis BOURRET 1934 is the type species of the genus Pararhabdophis BOURRET 1934. Synonymy: Kizirian et al. 2018 and Ren et al. 2018 synonymized Parahelicops with Hebius. |
| Etymology | Named after the type locality. |
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