Figure 33
Paleogene Clathromitrinae and Triospyrydidae. All from one sample from the Eocene deposits in Western Siberia.
I-III) Petalospyris tumidula Kozlova, 1966; IV) Scheme of its structure; V-IX) Tripodiscium (=Arachnocalpis) tumulosa (Kozlova, 1966); X, XI) T. sibirica (Kozlova) described (Kozlova and Gorbovetz, 1966) as Tripilidium clavipes Clark et Campbell subsp. sibirica Kozlova, 1966; XII, XIII) Tripodiscium sp. A, illustrated by Kozlova in the same work as Lithomelissa sp.; XIV) Scheme of the skeletal structure of Tripodiscium. |
