Reference

Ping Sun, Weibo Song, D. Ji, X. Hu (2005): Redescription of Pseudovorticella cylindrica (Dons, 1915) nov. comb. and Zoothamnium hiketes Precht, 1935, two poorly defined marine peritrichs (Ciliophora: Peritrichia) from the north China Sea – J. Nat. Hist. – 39: 2953 - 2965.