Camallanus

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 60

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