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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Published in | Paleontological journal Vol. 56; no. 2; pp. 123 - 135 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.04.2022
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0031-0301 1555-6174 |
DOI: | 10.1134/S0031030122020022 |