Reference

Erna Wirnsberger, Wilhelm Foissner, Hans Adam (1985): Morphogenesis, fine structure, and phylogenetic relationships of the "heterotrich" ciliate *Bryometopus atypicus* (Protozoa, Colpodea) – Annls Sci. nat. (Zool. Biol. Anim.) – 7: 113 - 128.