• 责任者：Xing Lida (Department of Biological Sciences ; University of Alberta ; 11455 Saskatchewan Drive ; Edmonton ; Alberta T6G 2E9 ; Canada) ; Gerard D.Gierliski
• 刊名：Geological Bulletin of China
• 出版年：2012
• 卷期：31(1)
• 关键词：兽脚亚目 ; Theropoda ; 足迹 ; tracks ; 河北 ; Hebei Province
• 页码：p.20-25
• 图表：2 illus., 1 table, 32 refs.
• 分类号：1103
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

A probable theropod dinosaur crouching trace and associated tracks from the Tuchengzi (Houcheng) Formation of Siliang Mountains, Chicheng County, Hebei Province, China are the largest theropod tracks currently known from the formation. Although the crouching trace lacks manus and tail marks, the traces are interpreted as made by a crouching theropod because they include a left metatarsal impression and associated ischial, and possibly pubic, callosity traces. It represents the third known example of an asymmetric crouching position adopted by a theropod.