Acta Palaeontologica Polonica

Aalenian Gryphaeinae from the Pieniny Klippen Belt of Poland

Halina Pugaczewska

Acta Palaeontologica Polonica 16 (4), 1971: 389-399

Gryphaeinae, found in Middle Aalenian deposits from the Pieniny Klippen Belt, are assigned to 4 species of the genus Gryphaea Lamarck, 1801. The studies included morphology of shells, their variability and ontogeny and progressive variability of umbo of left valves.

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