A New Radiolarian Family Provisocyntridae fam. nov. from the Late Paleozoic,Paleontological Journal

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A New Radiolarian Family Provisocyntridae fam. nov. from the Late Paleozoic
Paleontological Journal ( IF 0.7 ) Pub Date : 2022-04-22 , DOI: 10.1134/s0031030122020022
M. S. Afanasieva ₁

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Abstract

The genus Provisocyntra Nazarov et Ormiston, 1987 is revised and its diagnosis is emended. The features of the simultaneous centrifugal and tangential types of growth of the Provisocyntra test are analyzed. The presence of an internal framework in the form of a microsphere is confirmed. The species composition is expanded to include ten species from the Carboniferous–Middle Permian. Four new species of Early Tournaisian radiolarians from the Volga-Ural Basin are described: Provisocyntra grandis sp. nov., P. kononovae sp. nov., P. magniporosa sp. nov., and P. valminazae sp. nov. A new family Provisocyntridae fam. nov. is established. The diagnosis and composition of the order Spongiata Afanasieva et Amon, 2003 are emended.

更新日期：2022-04-24

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