Asthenodipsas vertebralis (BOULENGER, 1900)
Can you confirm these amateur observations of Asthenodipsas vertebralis?
|Higher Taxa||Pareidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Asian Slug Snake, Mountain Slug Snake, Mountain Snail Snake|
|Synonym||Amblycephalus vertebralis BOULENGER 1900|
Pareas vertebralis — SMEDLEY 1931: 122
Pareas vertebralis — GRANDISON 1972: 92
Pareas vertebralis — GRANDISON 1978: 294
Pareas vertebralis — MANTHEY & GROSSMANN 1997: 378
Pareas vertebralis — COX et al. 1998: 79
Asthenodipsas vertebralis — ISKANDAR & COLIJN 2002
Pareas vertebralis — YOUMANS et al. 2003 [HR 34: 389]
Pareas vertebralis — PAUWELS et al. 2003
Asthenodipsas vertebralis — GROSSMANN & TILLACK 2003
Pareas vertebralis — DAS & YAAKOB 2007
Pareas vertebralis — GOWER et al. 2012: 77
Asthenodipsas vertebralis — WALLACH et al. 2014: 60
|Distribution||West Malaysia, Pulau Tioman [HR 34: 389], Indonesia (Sumatra, Borneo)|
Type locality: Bukit Larut (= Maxwell’s Hill), Larut, 3000 feet elevation, Malay Peninsula.
|Types||Type: BMNH 1922.214.171.124 (and possibly additional specimens).|
|Diagnosis||Comparisons. Asthenodipsas vertebralis, ZRC 2.6619 can be differentiated from A. laevis, A. borneensis, A. malaccana, A. jamilinaisi and A. stuebingi by its higher number of ventrals (190 vs. 148–179), higher number of subcaudals (68 vs. 26–53), and the pairs of infralabials in contact (1st vs. 2nd or 3rd). It can be further separated from A. laevis by its number of dorsal scale rows (15/15/15 vs. 15/15/13) and the sharp vertebral keel (present vs. absent) (Quah et al. 2019, 2020). ZRC 2.6619 can also be differentiated from A. ingeri sp. nov. by the pairs of infralabials in contact (1st vs. 1st & 3rd), the number of supralabials in contact with the orbit (3 & 4 vs 3–5) and more pairs of posterior inframaxillaries (three vs two). (from Quah et al. 2021).|
|Comment||Synonymy: after DAVID & VOGEL 1996 and GROSSMANN & TILLACK 2003 and 2004. A. tropidonotus has been removed from the synonymy of A. vertebralis and revalidated by LOREDO et al. 2013.|
Taxonomy: According to the generic key given in Rao & Yang (1992) and to its original description, this species should belong to the genus Internatus, to which it is referred by DAVID & VOGEL 1996. But, according to Wallach (pers. comm.), it is probably a synonym of Pareas vertebralis (Boulenger, 1900), a species known from Malaya. The nominal taxon tropidonotus is not mentioned by Rao & Yang (1992) in their list of valid species of the genus Pareas and related genera. It is not clear whether this poorly known species was overlooked by these authors, or is considered a synonym of another Sumatran species. In the latter case, as no synonymy is given by Rao & Yang, it is not possible to indicate to which taxon it should be referred." (David & Vogel 1996).
Distribution: Reports from Borneo are based on misidentified Pareas = Asthenodipsas laevis (fide GROSSMANN & TILLACK 2004, Stuebing et al. 2014).
Habitat: partly arboreal (Harrington et al. 2018).