Cessipylorum Nazarov & Ormiston 1990

Nazarov & Ormiston 1990. [The biostratigraphic potential of radiolarians from the Palaeozoic.] Chuvashov, B.I.; Zhamoida, A.I.; Amon, E.O.[Eds]. [Radiolaria in biostratigraphy: collected proceedings.], Ural'skoe otdelenie AN SSSR, Sverdlovsk, 1990: 1-136. Chapter pagination: 3-25, 121, 125-126