Opisthotropis voquyi Ziegler & David & Ziegler & Pham & Nguyen & Le 2018, sp. nov.

Opisthotropis voquyi sp. nov. Holotype. IEBR 4326 [Field No. TYT.2013.4], an adult male, from Tay Yen Tu Nature Reserve, Bac Giang Province, 437 m asl., Vietnam, collected by Cuong The Pham et al. on 14 June 2013 (Figs. 6–8). Paratypes. VNMN 0 6315 [Field No. TYT 2013.1], male, collected by Cuong The Pham et al. in June 2013; VNMN 0 6316 [Field No. BG 2015.13], female, collected by Cuong The Pham et al. on 17 May 2015; IEBR 4327 [Field No. BG 2015.33], female, collected by Cuong The Pham et al. on 22 May 2015; IEBR 4328 [Field No. BG 2015.34], female, collected by Cuong The Pham et al. on 22 May 2015; ZFMK 100819 [Field No. BG 2015.35], female, collected by Cuong The Pham et al. on 22 May 2015; ZFMK 100820 [Field No. TYT 2014.11], female, collected by Hang An Thi in May 2014, all paratypes same locality data as the holotype (Figs. 8–10). Bourret & Pa) Sa Bourret & Pa) Sa Chapa () 1934 a? Tamdao) b Chapa) (a 1935 Chapa (a 1935) Chapa a (1935) Tam Dao (1935) b Dao Tam (b) 1935 NganSon c1935 ()) (1936 Angel 1933 (syntype Angel (1933 syntype. 259 M Bourret A. 57 1934 (. M 518 Bourret 953 X. Bourret. 954 X Bourret 451 M. Bourret 794. X Bourret M. 498 Bourret Bourret .Continued on next page TABLE 2b. (Continued) Diagnosis. A species of the genus Opisthotropis, characterized by a combination of the following characters: (1) internasal not in contact with loreal; (2) one preocular; (3) usually two postoculars; (4) one anterior temporal; (5) one posterior temporal; (6) 7 or 8, rarely 9 supralabials; (7) 25 maxillary teeth; (8) subcaudals 74–86; (9) 15 dorsal scale rows at neck, at midbody and before vent; (10) body scales smooth or only with few faint keels; (11) dorsal scales being grey, greyish-brown or brown in preservative, posteriorly more or less edged with pale greyishbrown. Description of holotype. Body stout, oval in cross section; head short, slightly broader than neck, depressed, dorsally covered with large shields; nostrils in dorsal position and oblique, narrow, piercing the middle of nasal, which is ...