Abstract

Bioerosion structures, including holes, pits, and grooves, on the surface of benthic foraminiferal tests from the Upper Cretaceous and Paleogene of Western Siberia are studied. Their morphology is examined, their possible origin and the paleogeographic and stratigraphic distribution in sections representing marine basins of Western Siberia are discussed. The ichnospecies assemblage studied includes Oichnus simplex Bromley, 1981, O. paraboloides Bromley, 1981, O. gradatus Nielsen et Nielsen, 2001, and O. ovalis Bromley, 1993.

中文翻译：

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西西伯利亚上白垩统和古近纪底栖有孔虫测试的生物侵蚀结构

摘要

研究了西西伯利亚上白垩统和古近纪底栖有孔虫测试表面的生物侵蚀结构，包括孔、凹坑和凹槽。对它们的形态进行了检查，讨论了它们可能的起源以及代表西西伯利亚海洋盆地的部分的古地理和地层分布。研究的物种组合包括Oichnus simplex Bromley, 1981、O. paraboloides Bromley, 1981、O. gradatus Nielsen et Nielsen, 2001 和O. ovalis Bromley, 1993。