Reference

Wilhelm Foissner, Sabine Agatha (1999): Morphology and morphogenesis of *Metopus hasei* #Sondheim#, 1929 and *M. inversus* (#Jankowski#, 1964) nov. comb. (Ciliophora, Metopida) – J. Euk. Microbiol. – 46: 174 - 193.