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Petrushevskaya 1971


Figure 114

Forms of Pterocanium praetextum.
I-III) P. praetextum typ., plankton, Pacific Ocean: I) JYN, station 9; II) RIS, station 21; III) RIS station 60; IV, V) P. cf. Praetextum, Middle Miocene, AMPH 6 (the development of the abdomen and legs varies).