Abstract

A new dromaeosaurid theropod dinosaur, Kansaignathus sogdianus gen. et sp. nov., is described based on a dentary from the Yalovach Formation (Santonian) at Kansai locality in northern Fergana Valley (Tajikistan) collected by Paleontological Institute of the Academy of Sciences of the USSR in 1963–1964. Dentary has 12 tooth alveoli and not downturned anterior end. There is a chin prominence. Dorsal margin is concave and ventral margin is convex. There are two rows of vascular foramina on the labial side and irregular intermediate foramina in the anterior part of a dentary. The interdental plates are not discernable. Kansaignathus is one of the most basal members of the subfamily Velociraptorinae. It fills the gap in the fossil record of the Velociraptorinae between the Early Cretaceous Deinonychus and more derived Campanian–Maastrichtian velociraptorines of Asia and North America.

中文翻译：

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塔吉克斯坦晚白垩世一种新的兽脚亚目恐龙（兽脚亚目，驰龙科）

摘要

一种新的驰龙科兽脚亚目恐龙Kansaignathus sogdianus gen。等 sp. 11 月，根据苏联科学院古生物研究所于 1963 年至 1964 年收集的位于费尔干纳谷（塔吉克斯坦）北部关西地区的 Yalovach 组（桑托尼亚）的齿状齿进行描述。牙齿有 12 个牙槽，前端不向下。有一个下巴突出。背缘是凹的，腹缘是凸的。唇侧有两排血管孔，牙齿前部有不规则的中间孔。齿间板无法辨别。关西纳图斯是 Velociraptorinae 亚科的最基础成员之一。它填补了早白垩世恐爪龙与亚洲和北美洲的坎帕阶-马斯特里赫特阶速龙之间的迅猛龙化石记录的空白。