BioStor
 | An Index to the British Annelids G Johnston (1846) Annals and Magazine of Natural History 16: 433-462 |
 | XXXIII.—On the invertebrate marine fauna and fishes of St. Andrews W C M'intosh (1874) Annals And Magazine of Natural History 14: 258-274 |
 | North American monogenetic trematodes. ii. The families Monocotylidae, Microbothriidae, Acanthocotylidae and Udonellidae (Capsaloidea) (1938) Journal of The Washington Academy of Sciences 28: 183-198 |
 | Trematodes of the Pacific Northwest, an annotated catalog Ivan Pratt and James E Mccauley (1961) Oregon State monographs. Studies in zoology 11: 1-113 |