河北赤城地区土城子组中一例极可能的兽脚类恐龙蹲伏迹

A probable crouching theropod dinosaur trace from the Tuchengzi Formation in Chicheng area,Hebei Province,China

描述了河北省赤城县寺梁山土城子(后城)组一例极可能的兽脚类恐龙蹲伏迹及相关的足迹,该蹲伏迹也是该组地层目前发现的最大的兽脚类足迹。虽然缺乏前足迹和尾迹,但因保存了左跖骨印、关联的坐骨及可能的耻骨胼胝印被定为蹲伏迹。该蹲伏迹是世界上第三例非对称的兽脚类恐龙蹲伏迹。

A probable theropod dinosaur crouching trace and associated tracks from the Tuc~ engzi （Houcheng） Formation of Siliang Mountain, Chicheng County, Hebei Province, China are the largest theropod tracks current y known from the formation. Although the crouching trace lacks manus and tail marks, the traces are interpreted as made by a crouct ~ng theropod because they include a left metatarsal impression and associated ischial, and possibly pubic, callosity traces. This represenl s the third known example of an asym- metric crouching position adopted by a theropod.