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Petrushevskaya 1971


Figure 115

Some forms related closely to Neosciadiocapsinae.
I, II) Species determined (Kozlova & Gorbovetz, 1966) as Sethocyrtis elegans Lipman, 1950, Eocene, Western Siberia (2 specimens in various positions); III) species known as Clathrocyclas universa Clark et Campbell, 1942; Oligocene. Cuba; IV, V) forms similar to the genus Clathrocyclas: IV) form known as Theocalyptra (=Pterocorys) bicornis (Popofsky, 1908), surface layer of the sediment, Antarctic, “Obj”, station 29; V) species described as Clathrocyclas bicornis Hays, 1965, horizon 1363-1366 cm, bottom sediment, Antarctic “Obj”, station 111.