Abstract

Lower Cretaceous Buchia (Bivalvia) from little known localities of Transcaucasia and Kamchatka are figured and described for the first time; a brief overview of all known finds of this genus in the Lower Cretaceous of the regions under consideration and the areas of the North Caucasus adjacent to Transcaucasia is given. The findings of Buchia inflata in Kamchatka made it possible to clarify (to the early Valanginian) the age of the host rocks, while Hauterivian B. keyserlingi in Azerbaijan are the youngest finds of the genus in the Tethyan succession. The assessment of the biostratigraphic and biogeographic significance of new Buchia finds is given.

中文翻译：

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北高加索、外高加索和堪察加下白垩统的布奇亚属（双壳纲）

摘要

首次发现并描述了来自鲜为人知的外高加索和堪察加地区的下白垩统布基亚（Bivalvia）；简要概述了该属在所考虑区域的下白垩统和与外高加索相邻的北高加索地区的所有已知发现。堪察加的Buchia inflata的发现使得澄清（到早期的 Valanginian）主岩的年龄成为可能，而阿塞拜疆的Hauterivian B. keyserlingi是特提斯岩系中最年轻的发现。对新发现的Buchia生物地层和生物地理意义进行了评估。