Macrofossil Assemblages in the Ryazanian Stage (Lower Cretaceous) of the Stratotype Region


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Авторы: Urman O.   (ИНГГ СО РАН)   Shurygin B.   (ИНГГ СО РАН)   Dzyuba O.   (ИНГГ СО РАН)  
дата публикации: 2019
реферат:
The stratotype region of the Ryazanian stage is located in the Oka River Basin near Ryazan, Central Russia. Since ammonites are very well studied here, we investigated other groups of macrofossils. We report a large number of bivalve genera: Arctica, Astarte, Buchia, Camptonectes, Chlamys, Ctenostreon, Entolium, Gomomya, Gresslya, Hartwellia, Lima, Meleagrinella, Modiolus, Oxytoma, and Pleuromya. The belemnites are represented by two cylindroteuthidid genera, Acroteuthis and Liobelus. In addition, brachiopods (Rhynchonellidae and Terebratulidae) and unidentifiable gastropod fragments have been revealed. The highest taxonomic diversity of macrofauna is observed in the Surites spasskensis ammonite Zone.
первоисточник: Open Journal of Geology
том: 10
страницы: 558-561
ISBN:
ISSN:
внешние ссылки:
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ojg-2019-9-10-558-561