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Abstract <p>The genus <i>Pachycingula</i> Baumgartner et LiXin, 2023, emend. nov. is revised and its diagnosis is emended. New radiolarian species <i>P. praebiporata</i> sp. nov., <i>P. alta</i> sp. nov., <i>P. capitata</i> sp. nov., <i>P. laevigata</i> sp. nov., are described from siliceous limestones of the lower Bazhenovo Formation of the Early Volgian age of the Yamal Peninsula. The presence of representatives of the genus <i>Pachycingula</i> is recorded in the Upper Jurassic (from the Lower Volgian substage of the Volgian regional stage of the Yamal Peninsula of Arctic Siberia to the Kimmeridgian–Tithonian of the Koryak Upland on Chukotka) within the Panboreal paleobiogeographic superregion.</p>

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New Radiolarian Species of the Genus Pachycingula (Radiolaria) from the Upper Jurassic of Western Siberia (Yamal Peninsula)

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • V. S. Vishnevskaya

摘要

Abstract

The genus Pachycingula Baumgartner et LiXin, 2023, emend. nov. is revised and its diagnosis is emended. New radiolarian species P. praebiporata sp. nov., P. alta sp. nov., P. capitata sp. nov., P. laevigata sp. nov., are described from siliceous limestones of the lower Bazhenovo Formation of the Early Volgian age of the Yamal Peninsula. The presence of representatives of the genus Pachycingula is recorded in the Upper Jurassic (from the Lower Volgian substage of the Volgian regional stage of the Yamal Peninsula of Arctic Siberia to the Kimmeridgian–Tithonian of the Koryak Upland on Chukotka) within the Panboreal paleobiogeographic superregion.