New radiolarians from the Devonian of the southern Ural Mountains: 2. Middle-Late Devonian |
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| Authors: | M S Afanasieva E O Amon |
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| Institution: | (1) Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow, 117647, Russia;(2) Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtovyi per. 7, Yekaterinburg, 620151, Russia |
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| Abstract: | Middle-Late Devonian Radiolarians are recorded for the first time in the southern Ural Mountains in Bashkortostan, in a section of Kariukmas Mountain (Upper Eifelian) and on the southern slope of Argagan Mountain (Middle Frasnian). The new Late Eifelian assemblage is composed of 17 species of 11 genera, and Middle Frasnian radiolarians comprise 13 species of 7 genera of spherical, discoidal, pylomate, and spiny radiolarians. A new species, Primaritripus kariukmasensis, sp. nov., is described. The prevalence of discoidal forms in the oryctocenosis suggests shallow marine conditions in the Late Eifelian and Middle Frasnian basins. Two new biostratons, the Upper Eifelian beds with Primaritripus kariukmasensis and Middle Frasnian beds with Primaritripus chuvashovi, are established based on radiolarians. |
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| Keywords: | Radiolaria new species new biostratons Middle-Late Devonian Southern Ural Mountains Russia |
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