Reference

J.-P. Mignot, Félix Marie Affa'a (1995): Patterning in opalinids. III. The cytoskeleton of Cepedea sudafricana (Fantham, 1923) Affa'a & Lynn 1994, an intermediate type between Opalina ranarum and Protoopalina pseudonutti – Arch. Protistenkunde – 145: 241 - 249.