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Petrushevskaya 1971


Figure 142

Extinct Spyrida.
I-III) Acanthodesmia fibula (Ehr), Eocene, DODO 123D (3 specimens in various positions); IV, V) A. (=Giraffospyris) circumtexta (Goll, 1967), Middle Miocene, AMPH 6P (2 specimens in various positions); VI-IX) Acanthodesmia gn. Sp.: VI, VII) Middle Miocene, AMPH 16P (VIII, anteriorly; IX, from above); X, XI) Tricyclidium cf. dictyospris Hck., similar also to Microcubus amphispyris Hck.: X) Lower Miocene, JYN V 20P; XI) Upper Oligocene, JYN V 16P. Other designations same as in fig. 10.