Systematics of the caecilian family Chikilidae (Amphibia: Gymnophiona) with the description of three new species of Chikila from northeast India Author Kamei, Rachunliu G. Author Gower, David J. Author Wilkinson, Mark Author Biju, S. D. text Zootaxa 2013 3666 4 401 435 journal article 43483 10.11646/zootaxa.3666.4.1 ae8b490a-b325-4d9f-90ed-ba0721b3bf5b 1175-5326 246458 15114087-1781-4D4D-9B06-FD29490E0C25 Key to the species of Chikila The following key serves to identify the four nominal species of Chikila based on specimens in our examined sample. 1. Eye visible; head pointed; fewer VPs than PMs; maximum adult size generally less than 200 mm ; northeast India north of Brahmaputra river......................................................................... Chikila darlong - Eye generally not clearly visible; head more broadly rounded anteriorly or moderately pointed; similar numbers of VPs and PMs or fewer PMs; maximum adult size generally greater than 200 mm ; south of Brahmaputra river....................2 2. Chin , throat and underside of anteriormost primary annuli with pale blotches; pale eye-tentacle patch extensive, generally encircling and extending posterior to position of eye; disc surrounding vent partly pigmented; no unpigmented patch immediately anterior of disc surrounding vent; annular grooves very strongly marked............................ Chikila fulleri - Chin , throat and underside of anteriormost primary annuli without pale blotches; pale eye-tentacle patch restricted, generally not extending back to or beyond position of eye; disc surrounding vent unpigmented; unpigmented patch immediately anterior of disc surrounding vent; annular grooves weakly or moderately marked.......................................... 3 3. Strongly bicoloured; relatively large, narrowly separated choanae (interchoanal gap <1.25 x width of each choana)............................................................................................... Chikila gaiduwani - Weakly bicoloured, almost unicoloured; narrow, widely separated choanae (interchoanal gap> 2.25 x width of each choana).......................................................................................... Chikila alcocki