Systematics of the caecilian family Chikilidae (Amphibia: Gymnophiona) with the description of three new species of Chikila from northeast India Kamei, Rachunliu G. Gower, David J. Wilkinson, Mark Biju, S. D. Zootaxa 2013 3666 4 401 435 3MXH [412,502,980,1006] Amphibia Chikilidae Chikila GBIF Animalia Gymnophiona 28 429 Chordata genus    1. Eye visible; head pointed; fewer VPs than PMs; maximum adult size generally less than 200 mm; northeast Indianorth 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