Guide to the Parasites of Fishes of Canada Part V: Nematoda Author Arai, Hisao P. Author Smith, John W. text Zootaxa 2016 4185 1 1 274 journal article 10.11646/zootaxa.4185.1.1 11620862-ddcf-4c01-b0d9-32867e03d74b 1175-5326 165530 0D054EDD-9CDC-4D16-A8B2-F1EBBDAD6E09 Key to species of Camallanus 1 Head straight, not bent ventrally. Males <9.0 long, with 11 pairs of pedunculate caudal papillae: six pairs pre-cloacal, five pairs post-cloacal. Female tail> 1.5 long........................................................ C. oxycephalus - Head bent slightly ventrally. Males> 9.0 long, with 11 pairs of pedunculate and two pairs of sessile, caudal papillae: one sessile and seven pedunculate pairs pre-cloacal, one sessile and four pedunculate pairs post-cloacal. Female tail <0.6 long.............................................................................................. C. ancylodirus