古脊椎动物学报2013，Vol.51Issue(3)：184-198,15.
四川盆地上三叠统最古老的兽脚类恐龙和似哺乳四足类动物足迹
Earliest records of theropod and mammal-like tetrapod footprints in the Upper Triassic of Sichuan Basin, China
摘要
Abstract
Eubrontes-and Grallator-sized theropod footprints are known from two localities in the Upper Triassic Xujiahe Formation of the Sichuan Basin,southwest China.The larger footprints include a partial trackway with two successive pes imprints that were named as Pengxianpus cifengensis.Compared with robust Eubrontes,they have slender digits,less welldefined pad impressions and display a wider digit divarication similar to the theropod ichnotaxon Kayentapus from the Late Triassic-Early Jurassic.Presently,a synonymy of the latter cannot be proved conclusively and the ichnotaxon is retained here.For both footprints,some small areas preserve skin texture with polygonal scales,the clearest preservation is in a small area on the metatarsal-phalangeal pad Ⅳ of the second imprint.The smaller theropod footprints are also part of an incomplete trackway.They show a wide digit divarication similar to Kayentapus and Pengxianpus but they are here tentatively referred to theropod footprints indet.A peculiarity on the surface with Pengxianpus is the presence of small pes or manus imprints that can be assigned to mammal-like tetrapods somewhat similar to those known from Triassic-Jurassic strata of North America and southern Africa.This is the first report of mammal-like footprints in the Triassic of southeastern Asia.关键词
四川盆地/晚三叠世/须家河组/兽脚类足迹/似哺乳类足迹Key words
Sichuan Basin, China/Late Triassic/Xujiahe Formation/theropod tracks/mammallike tracks分类
生物科学引用本文复制引用
邢立达,Hendrik KLEIN,Martin G.LOCKLEY,王仕莉,陈伟,叶勇,松川正树,张建平..四川盆地上三叠统最古老的兽脚类恐龙和似哺乳四足类动物足迹[J].古脊椎动物学报,2013,51(3):184-198,15.基金项目
This research project was supported by the Key Laboratory of Vertebrate Evolution and Human Origins of CAS (2011LESV008). （2011LESV008）
