Abstract Sampling of six horizons of quartz-glauconite sands in Kaniv dislocations in Ukraine yielded more than three thousand vertebrate specimens, including elasmobranch teeth, chimaera dental plates, actinopterygian and sauropsid teeth and bones. Our study represents the first illustrated and detailed description of elasmobranch teeth from Ukrainian Albian deposits since Rogovich (1861) , whose specimens were still preserved in the collections of the Kiev National Natural History Museum of National Academy of Sciences of Ukraine. Twenty-three elasmobranch species belonging to eight orders were identified in our samplings and in some of Rogovich’s material. This paper provides new data on the systematics of Cretaceous elasmobranchs and assesses the taxonomic status of Rogovich’s species. Sampled assemblages include hybodonts, synechodontiforms, hexanchiforms, squaliforms, squatinifroms, orectolobiforms, heterodontiforms and lamniforms. The latter dominate the assemblages, both in terms of species and number of specimens with small odontaspidiid species, early pseudoscapanorhynchids and archaeolamnids as well as large carnivorous sharks Cretoxyrhina and Cretolamna. Most importantly, Paraisurus macrorhizus and Cretoxyrhina vraconensis findings indicate a Late Albian age for the sampled deposits, which were so far considered Albian-Cenomanian.

中文翻译：

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Elasmobranch (Chondrichthyes) 来自乌克兰阿尔比 (Albian)（下白垩纪）的组合

摘要 对乌克兰卡尼夫错位的六层石英海绿石砂进行采样，获得了三千余个脊椎动物标本，包括弹鳃类牙齿、嵌合体牙板、放线类和蜥形类的牙齿和骨骼。我们的研究代表了自 Rogovich (1861) 以来对来自乌克兰阿尔比亚矿床的弹鳃牙齿的首次图解和详细描述，其标本仍保存在乌克兰国家科学院基辅国家自然历史博物馆的收藏中。在我们的采样和一些 Rogovich 的材料中，确定了属于 8 个目的 23 种棘皮动物。本文提供了有关白垩纪 elasmobranch 系统学的新数据，并评估了 Rogovich 物种的分类地位。采样的组合包括弓牙类动物、粘牙类动物、六边形、squaliforms、squatinifroms、orectolobiforms、heterodontiforms 和lamniforms。后者在物种和标本数量方面占主导地位，包括小型齿鲨科、早期伪鲵科动物和古兰科动物以及大型食肉鲨鱼 Cretoxyrhina 和 Cretolamna。最重要的是，Paraisurus macrorhizus 和 Cretoxyrhina vraconensis 的发现表明采样沉积物的晚期阿尔比时代，迄今为止被认为是阿尔比-塞诺曼阶。