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Triangle Keelback
Xenochrophis trianguligerus (Boie, 1827)
Also calledDorso-de-quilha-triangulada (por) · Dreiecks-Fischnatter (deu) · Triangel-kølsnog (dan) · Ular Segitiga Merah (ind) · งูลายสอน้ำตก (tha) · งูลายสอลายสามเหลี่ยม (tha) · 三角漁游蛇 (zho)
First described in: Boie, F. Bemerkungen über Merrem’s Versuch eines Systems der Amphibien, 1. Lieferung: Ophidier.
The triangle keelback (Xenochrophis trianguligerus) is a species of snake found in Brunei Darussalam, Burma (Myanmar), Cambodia, India (Nicobar Islands; Arunachal Pradesh (Deban - Changlang district)), Indonesia (Nias, Mentawai, Sumatra, Laos, Malaysia (Malaya and East Malaysia), Singapore, Thailand, and Vietnam.
The type locality is Java.
Descriptions from checklists and floras indexed by GBIF
discussion
Remarks. A common snake elsewhere throughout its range (Tweedie 1983; Stuebing et al. 2014; de Lang 2017), X. trianguligerus is exceedingly rare in Singapore (Baker & Lim 2012). Xenochrophis trianguligerus was first reported in Singapore by Ģnther (1858 b) who examined a specimen from Hardwicke’s collection. Blanford (1881) included X. trianguligerus in his list from Dennys (Dennys 1880 a), and Boulenger (1893) reported three specimens from Hardwicke and one by Dennys deposited at NHMUK. Subsequent to de Haas (1949) report of two specimens stored at the Raffles Museum that were collected in 1894 at BTNR and 1909 at Holland Road, X. trianguligerus was not recorded again until 86 years later (Table 2) on 20 May 1995 when a roadkill was found along UPRR (Lim et al. 1995) that Teo & Rajathurai (1997) reported as a moult of X. trianguligerus. Three specimens of H. petersii were misidentified as X. trianguligerus (see account of H. petersii above). Occurrence. Known only from a few specimens predating 1909 and one from 1995. Rare.
Singapore’s herpetofauna: updated and annotated checklist, history, conservation, and distribution
materials_examined
LKCNHM & NHMUK Museum specimens. Singapore (no locality): BMNH 1880.9. 10.38 (no date), BMNH 1963.962 – 963 (no date); Bukit Timah Nature Reserve: ZRC. 2.2493 (26 - May- 1894); Holland Road: ZRC. 2.2494 (31 - May- 1909). Additional Singapore museum specimens. Singapore (no locality): BPBM; Bukit Timah Nature Reserve: BPBM. Singapore localities. Bukit Timah Nature Reserve — Holland Road * — Lower Peirce Forest — Upper Peirce Reservoir Road.
Singapore’s herpetofauna: updated and annotated checklist, history, conservation, and distribution
materials_examined
Singapore conservation status. Critically Endangered. Conservation priority. Highest.
Singapore’s herpetofauna: updated and annotated checklist, history, conservation, and distribution
description
Description. Not sexed, juvenile specimen 245 mm SVL, 95 TailL; 225 ventrals, 96 subcaudals, 19 - 19 - 15 dorsals; single loreal rectangular, preocular single, 3 postoculars. Dorsum olive brown, dark rectangular blotches laterally with the anterior portion of the sides yellow and red, fading in coloration towards the midbody. Head hued with blue, dark sutures on some of the supralabials.
Filling the BINs of life: Report of an amphibian and reptile survey of the Tanintharyi (Tenasserim) Region of Myanmar, with DNA barcode data
In the stacks
Searching the stacks…
Every page naming Xenochrophis trianguligerus in the Biodiversity Heritage Library →
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 2454920.