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

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...

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Bibliographic Details
Published inPaleontological journal Vol. 56; no. 2; pp. 123 - 135
Main Author Afanasieva, M. S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2022
Springer
Springer Nature B.V
Subjects
Carboniferous
Community composition
Composition
Diagnosis
Earth and Environmental Science
Earth Sciences
New family
New species
Paleontology
Paleozoic
Permian
Provisocyntridae
Radiolaria
Species composition
morphology
new taxa
Spumellaria
Carboniferous
Radiolaria
revision
Middle Permian
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Summary: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.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030122020022