辽宁省四合屯下白垩统义县组的兽脚类足迹化石和可能的造迹者

摘要

Herein we describe three and one half footprints that pertain to Grallator isp. from the Lower Cretaceous Yixian Formation, Sihetun, Liaoning Province, China. This is the first description of dinosaur footprints from the Yixian Formation. The tracks were left by at least three individual track makers. It is estimated from the tracks that the body lengths of the track makers were 1.51 m, which is the average length of known theropods from the Yixian Formation. The feet of Caudipteryx and Sinosauropteryx were reconstruct- ed. The former was more similar than the latter to the Grallator isp. track outlines. Feet capable of registering Grallator morphotype tracks may therefore have been widely distributed in small-medium sized theropods (other than dromaeosaurids and troodontids) from the Yixian Formation.%记述了辽宁省四合屯下白垩统义县组三个半恐龙足迹,归入似鹬龙足迹(亦译为跷脚龙足迹)一未定种(Grallator isp.).这是义县组恐龙足迹化石的首次描述.该行迹至少由3个造迹者所造.从足迹推断恐龙体长1.51 m,属于义县组兽脚类恐龙较为普遍的体长范围.重建了尾羽鸟(Caudipteryx)和中华龙鸟(Sinosauropteryx)的足部,前者的足迹轮廓与似鹬龙足迹未定种的吻合度超过后者.根据化石记录,似鹬龙足迹类型可能广泛存在于义县组的各种中小型兽脚类(驰龙类与伤齿龙类除外)中.