Amadori Manuel, Solonin Sergey V, Vodorezov Alexey V, Shell Ryan, Niedźwiedzki Robert, Kriwet Jürgen
University of Vienna, Department of Palaeontology, UZAII, Geozentrum, Josef-Holaubek-Platz 2, Vienna, 1090, Austria.
Department of Geography, Ecology and Natural Management, Ryazan State University named for S. Yesenin, Ryazan, 390000, Russia.
J Vertebr Paleontol. 2023 Feb 9;42(2):e2162909. doi: 10.1080/02724634.2022.2162909.
Isolated teeth belonging to the genus Agassiz, 1834 (Chondrichthyes; Elasmobranchii) from the Upper Cretaceous of the Ryazan and Moscow Oblast regions (European Russia) are described and discussed in detail herein. The taxonomic composition of the assemblage from the Ryazan region is very diverse including the first records of the cuspidate species . and . , which thus is largely consistent with those from other contemporaneous European localities. ubiquitously inhabited epicontinental seas of Europe during most of the Cretaceous with the most diverse assemblages coming from southern England, northern Italy, Belgium, and European Russia. Additionally, the material documented here from the Cenomanian of Varavinsky ravine area (Moscow Oblast) represents the northernmost occurrence of hitherto reported from Europe. It is evident that the Late Cretaceous shallow seas of the Russian platform represented a crucial pathway for the dispersal of from the European peri-Tethys to the eastern margins of the Neo-Tethyan Ocean. The Albian-Campanian records of from Europe indicate that its dominance in the peri-Tethys persisted for most of its evolutionary history. A local temperature drop across most of the European shallow seas probably contributed to the narrowing of its geographic range in the peri-Tethyan seas towards the end of the Mesozoic Era. The fossil remains of documented herein are accordingly of utmost importance for better understanding the taxonomic composition of Russian fossil ichthyofaunas and also inform about the dispersal of towards western and eastern peri-Tethyan seas during the Late Cretaceous.
本文详细描述并讨论了来自梁赞和莫斯科州地区（俄罗斯欧洲部分）上白垩统的、属于1834年阿加西属（软骨鱼纲；板鳃亚纲）的孤立牙齿。梁赞地区组合的分类组成非常多样，包括尖牙物种的首次记录……，因此在很大程度上与其他同期欧洲地区的记录一致。……在白垩纪的大部分时间里普遍栖息于欧洲的陆缘海，种类最多样的组合来自英格兰南部、意大利北部、比利时和俄罗斯欧洲部分。此外，这里记录的来自瓦拉温斯基峡谷地区（莫斯科州）森诺曼阶的材料代表了……迄今在欧洲报道的最北分布。显然，俄罗斯地台的晚白垩世浅海是……从欧洲特提斯周边向新特提斯洋东缘扩散的关键通道。欧洲阿尔比阶 - 坎帕阶的……记录表明，它在特提斯周边的优势在其大部分演化历史中一直持续。欧洲大部分浅海局部的温度下降可能导致了中生代末期其在特提斯周边海域地理范围的缩小。因此，本文记录的……化石残骸对于更好地理解俄罗斯化石鱼类区系的分类组成至关重要，也为了解晚白垩世期间……向特提斯周边西部和东部海域的扩散提供了信息。
