Reference

Wilhelm Foissner (1997): Updating the trachelocercids (Ciliophora, Karyorelictea). IV. Transfer of *Trachelocerca entzi* #Kahl#, 1927 to the Gymnostomatea as a new genus, *Trachelotractus* gen. n. (Helicoprorodontidae) – Acta Protozool. – 36: 63 - 74.