Abstract

Old and new ammonoid collections from the Devonian–Carboniferous Boundary Section in Berchogur (Western Kazakhstan) are examined. The ammonoids come from the Acutimitoceras Genozone, from beds similar in age to the Stockum Fauna of Germany. The assemblage includes mostly species of the genera ?Imitoceras and Acutimitoceras, with diverse shapes of initial whorls. The new species Acutimitoceras alabasense sp. nov. and A. dzhanganense sp. nov. are described.

中文翻译：

---

Berchogur（哈萨克斯坦西部）泥盆纪-石炭纪边界层的新铵盐

摘要

考察了Berchogur（哈萨克斯坦西部）泥盆纪-石炭纪边界段的新旧铵盐收集物。氨化物来自Acutimitoceras Genozone，其床龄与德国的Stockum动物区系相似。该组合主要包括属的种。Imitoceras和Acutimitoceras，具有各种形状的初始螺纹。新种Acutimitoceras alabasense sp。十一月 和A. dzhanganense sp。十一月 描述。