Literature
- Ball, I. R. 1973a. On the anatomy and affinities of Nesion arcticum Hyman, a marine triclad from Alaska (Platyhelminthes, Turbellaria). Can. J. Zool. 51: 1299-1305.
- Ball, I. R. 1975a. Contributions to a revision of the marine triclads of North America: the monotypic genera Nexilis, Nesion, and Foviella (Turbellaria: Tricladida). Can. J. Zool. 53: 395-407.
- Hyman, L. 1956. North American triclad Turbellaria 15. Three new species. Am. Mus. Novit. 1808: 1-14.
- Hyman, L. 1957. North American Rhabdocoela and Alloeocoela. 6. A further study of Mesostoma. Amer. Mus. Novit. 1829: 1- 15.
- Rausch, R. L. and V. R. Rausch 1968. On the biology and systematic position of Microtus abbreviatus Miller, a vole endemic to the St. Matthew Islands, Bering Sea. Z. Säugetierk. 33: 65-99.