A new ornithomimid theropod from the Upper Cretaceous Bissekty Formation of Uzbekistan

<i>Dzharacursor</i> gen. nov. is established for the reception of <i>Archaeornithomimus</i>(?) <i>bissektensis</i> Nesov, 1995 from the Upper Cretaceous (Turonian) Bissekty Formation of Uzbekistan. <i>Dzharacursor bissektensis</i> is represented by cranial elements and many isolated postcranial bones that show considerable ontogenetic and some individual variation. Several of the morphological characters previously hypothesized as autapomorphies for <i>Qiupalong henanesis</i> and <i>Aepyornithomimus tugrikinensis</i> are found to be variable in the hypodigm for <i>Dzaracursor bissektensis</i>. <i>Dzharacursor bissektensis</i> is one of the oldest known ornithomimids in Asia. Phylogenetic analysis places this taxon at the base of the ornithomimid radiation, but more derived than <i>Archaeornithomimus asiaticus</i>.

<i>Dzharacursor</i> gen. nov.（新属）的建立旨在容纳1995年Nesov命名的疑名<i>Archaeornithomimus</i>(?) <i>bissektensis</i>，该物种发现于乌兹别克斯坦上白垩统（土伦阶）比塞克提组。<i>Dzharacursor bissektensis</i>以颅骨部件及多件孤立的后肢骨骼为代表，这些骨骼显示出显著的个体发育变异及部分个体差异。此前被假设为河南秋扒龙（<i>Qiupalong henanesis</i>）和图格里金巨似鸟龙（<i>Aepyornithomimus tugrikinensis</i>）自近裔特征的若干形态学性状，在<i>Dzharacursor bissektensis</i>的模式标本群中被发现存在变异。<i>Dzharacursor bissektensis</i>是亚洲已知最古老的似鸟龙类之一。系统发育分析表明，该分类单元位于似鸟龙类辐射演化的基部，但比亚洲古似鸟龙（<i>Archaeornithomimus asiaticus</i>）更为进步。