Reference

Genoveva F. Esteban, José Luis Olmo, B.J. Finlay (2001): Redescription of *Psilotricha acuminata* Stein, 1859 and revisions of the genera Psilotricha and Urospinula (Ciliophora, Hypotrichida) – J. Euk. Microbiol. – 48/3: 280 - 292.