Pha-Ngan Kukri Snake

description

Holotype. PSUZC-R 732 (field number MS 631); adult female found in Wat Phu Khao Noi (9 ° 44 ’ 02.8 ” N, 99 ° 59 ’ 25.1 ” E), Ko Pha-Ngan Sub-district, Ko Pha-Ngan District, Pha-Ngan Island (= Ko Pha-Ngan or Koh Phangan), Surat Thani Province, peninsular Thailand; collected by P. Chantong on 20 December 2018. Paratype. PSUZC-R 733 (field number MS 632); adult male; same locality and collector as holotype, collected on 15 December 2018. Diagnosis. Oligodon phangan sp. nov. can be distinguished from all other congeneric species by a combination of its maximal known SVL of 369.1 mm; 12 maxillary teeth, the posterior three enlarged; two internasals; two prefrontals; eight supralabials; loreal present; two postoculars; 17 - 17 - 15 dorsal scale rows; 163 – 166 ventrals and 33 – 42 divided subcaudals; a single anal; dorsal color brown with a pair of discreet paravertebral and lateral stripes; no dorsal or supracaudal bands, blotches or crossbars; background color of belly pinkish-orange; underside of tail immaculate. Description of holotype. Adult female. Body robust but elongate. SVL 358.3 mm; TaL 53.2 mm. Tail robust, tapering, accounting for 12.9 % of the TL (411.5 mm). Pupil round. He

Two new Kukri Snake species (Colubridae: Oligodon) from the Nakhon Si Thammarat Mountain Range, and addition of O. ocellatus to the fauna of Thailand