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Petrushevskaya 1971


Figure 36

Representatives of Plagiacanthidae, close to Clathromitrinae.
I) Tripodiscium (=Tripilidium) longipes (Clark et Campbell, 1942), Upper Eocene, California, 1795; II) Archiscenium tricolpium (Hck.), plankton, Pacific Ocean "Vityaz" station 167, 100-200 m; III) Sethoperinae gen. sp. juv., plankton, Pacific Ocean, RIS 52; IV, V) Clathromitrinae gen. spec. juv., surface sediment, Antarctic, "Obj", 34 (in various positions).
Other designations same as in fig. 10.