Abstract

Ammonites of subfamily Leptosphinctinae, ancestral to Perisphinctoidea, are revised based on the study of new collections from the lower part of the Upper Djangura Subformation (beds with Orthogarantiana humilis of the Upper Bajocian Strenoceras niortense zone) at the village of Krasnogorskaya on the Kuban River (Russia, Karachay-Cherkessia). The macroconchs of Leptosphinctes (Leptosphinctes) kardonikensis (Kakhadze et Zessashwili) and L. (L.) stephanoceratoides (Kakhadze et Zessashwili), associated with the microconchs L. (Kubanoceras) asinus (Zatwornitzky) and L. (K.) paucicosta (Kakhadze et Zessashwili), are described. These taxa are earliest representatives of the genus Leptosphinctes known from the modern territory of Russia.

中文翻译：

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在北高加索地区的上巴霍期尼奥尔琴斯带（侏罗纪中部）最早的脂囊菌（Ammonoidea：Perisphinctidae）上

摘要

根据对库班河上克拉斯诺戈尔斯卡亚（Krasngorskayaskaya）村（上库桑河（Krasangorskaya）（上）的上Djangura亚型下部（上巴乔亚Strenoceras niortense区的Orthogarantiana humilis的床）下部的新收集物进行研究的基础上对新发现的Leptosphinctinae亚科的亚铵盐进行了修订（俄罗斯，卡拉恰伊-切尔克斯西亚）。的macroconchs Leptosphinctes（Leptosphinctes）kardonikensis（Kakhadze等Zessashwili）和大号。（L.）stephanoceratoides（Kakhadze et Zessashwili），与微孔螺L有关。（Kubanoceras）asinus（Zatwornitzky）和大号。描述了（K.）paucicosta（Kakhadze等，Zessashwili）。这些分类单元是从俄罗斯现代领地已知的小球藻类的最早代表。