Reference

Helmut Berger, Wilhelm Foissner, Hans Adam (1985): Morphological variation and comparative analysis of morphogenesis in *Parakahliella macrostoma* (#Foissner#, 1982) nov. gen. and *Histriculus muscorum* (#Kahl#, 1932), (Ciliophora, Hypotrichida) – Protistologica – 21: 295 - 311.