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Petrushevskaya 1971


Figure 122

Ancient and recent Eucyrtidiidae, with a “striated” surface of the shell.
I-III) Species described as Dictyomitra striata Lipman, 1952, Campanian, Western Siberia (according to Kozlova and Gorbovetz, 1966): I) right; II) another specimen from the left; III) scheme of its structure; IV) Dictyomitra multicostata Zittel, 1876, Upper Cretaceous, California, station 1144; V) Lithomitra sp., similar to Siphocampe annulosa Hck., 1887, surface layer of the bottom sediment, Pacific Ocean, “Vityaz”, station 5117; VI) L. cf. Eruca Hck., 1887, from the same sample; VII, VIII) Lithomitra sp. b, one and the same specimen, Upper Oligocene, JYN V 16P; IX) L. (=Eucyrtidium) acephalum (Ehr), Eocene DODO 123; X) L. Clevei Petrush., surface layer of the sediment, Norwegian Sea, “Sevastopol”, st. 2104. Other designations same as Fig. 10.