Revision of the genus Entactinosphaera Foreman, 1963 and the new genus Retientactinosphaera gen. nov. (Paleozoic radiolaria) |
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Authors: | M. S. Afanasieva |
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Affiliation: | 1.Borissiak Paleontological Institute,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The genus Entactinosphaera Foreman, 1963 is revised; it is shown to combine seven different genera, which are distinguished by morphological characters and belong to three orders of two radiolarian classes: the class Sphaerellaria, order Entactiniata (Bientactinosphaera, Entactinosphaera, Helioentactinia, Radiobisphaera), and class Spumellaria, orders Cancelliata (Retientactinosphaera, Magnisphaera) and Spongiata (Spongentactinia). New radiolarian taxa from the Middle Frasnian-Lower Famennian of the Timan-Pechora Basin and from the Lower Famennian of the Polar Ural Mountains, Russia, are described: Retientactinosphaera gen. nov., R. magnifica sp. nov., and R. clavata sp. nov. |
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