Middle Oxfordian – Lower Kimmeridgian ostracod zones from the Mikhalenino section (Kostroma region) and their comparison with synchronous strata of the Eastern and Western Europe
Abstract:The study focuses on Oxfordian-Kimmeridgian ostracods from the Mikhalenino section (Kostroma region, Russia). In the Upper Oxfordian - Lower Kimmeridgian (Densiplicatum – Bauhini ammonite Zones) we distinguished ostracod zones: Sabacythere attalicata – Eucytherura costaeir- regularis (Densiplicatum Zone), Eucyterura – Tethysia (Tenuiserratum to Bauhini Zone). In the lower Kimmeridgian, Kitchini ammonite Zone (Subkitchini Subzone), we identified ostracod zones Schuleridea triebeli, Neurocythere jakovlevae – Klentnicella rodewaldensis and Galliaecytheridea fragilis. A comparison has been made between the ostracod zones from the Mikhalenino section and coeval strata from Western and Eastern Europe. In addition, a new species, Neurocythere jakovlevae Kolpenskaya in Tesakova et al., sp. nov., was described from the Lower Kimmeridgian, Kitchini Zone, Subkitchini Subzone.
Document Type: Research Article
Publication date: December 1, 2012
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