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Neocomian oysters from Central Poland

100%

Pugaczewska H.

Acta Palaeontologica Polonica

1975

tom 20

nr 1

Fourteen species of gryphaeas and oysters of seven genera from a section ranging between the Valanginian and Lower Hauterivian have been described and the morphology, development and individual variability of their shells studied.

Jurassic Ostreidae of Poland

80%

Pugaczewska H.

Acta Palaeontologica Polonica

1971

tom 16

nr 3

Thirty five species of oyster pelecypods are described from the Middleand Upper Jurassic of Poland, belonging to 7 genera and 3 subfamilies: Ostreinae, Vialov 1936, Gryphaeinae, Vialov, 1936 and Exogyrinae, Vialov, 1936. Morphology of species, their development and individual variability are investigated. The lithological and geological relationships of the area under investigation, the influence of environment onto the shell morphology, examples of functional and structural adaptations of Ostreidae and shell microstructure are characterized. The remarks on the phylogeny of Ostreidae are completed by an introduction of two development stages: Catinula and Nanogyra. The systematic position of Nanogyra nana Beurlen, 1958 is discussed.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

2 Pugaczewska H.

1 1975

1 1971

Wyniki wyszukiwania

Neocomian oysters from Central Poland

Jurassic Ostreidae of Poland