河北侏罗-白垩纪界线最古老的恐爪龙类足迹

记述中国河北省赤城县倪家沟化石点一组恐龙行迹,并命名一新属新种--中国猛龙足迹(Menglongipus sinensis ichnogen.et ichnosp.nov.).足迹来自土城子组,位于侏罗-白孚纪界线.相邻的义县组曾发现最古老的恐爪龙类骨骼化石,而中国猛龙足迹的发现表明恐爪龙类早在义县组之前便出现在该地区.中国猛龙足迹的造迹者体长约65cm,非常接近于基十的近鸟类.此外,为四川伶盗龙足迹(Velociraptorichnus sichuanensis)的模式标本提供更多细节,并讨论驰龙类足迹型与其他兽脚类足迹之间的联系.

THE EARLIEST KNOWN DEINONYCHOSAUR TRACKS FROM THE JURASSIC-CRETACEOUS BOUNDARY IN HEBEI PROVINCE,CHINA

Herein we describe a single trackway that pertain to Menglongipus sinensis ichnogen.et ichnosp.nov.from the Nijiagou track site in the Chicheng county,Hebei Province,China.The tracks Occur in the Tuchengzi Formation,which spans the Jurassic-Cretaceous boundary.The discovery of M.sinensis indicates that deinonychosaurians occupied this area prior to deposition of the Yixian Formation,from which the oldest deinonychosaur body fossils in the region have been found.The body length(about 65cm)of the M.sinensis track maker is very similar to that estimated for basal paravians.Additional details are provided about the type Velociraptorichnus sichuanensis,and the association between dromaeopodid and other theropod tracks is discussed.