陕西横山晚三叠世鱼类游泳遗迹化石新材料  

NEW EVIDENCES OF LATE TRIASSIC FISH SWIMMING TRACES IN HENGSHAN COUNTY, SHAANXI PROVINCE, CHINA

作　　者：卢宗盛[1] 郝朝坤[1] 陈斌[1] 李小艳[1] 

机构地区：[1]中国地质大学地球科学学院,武汉430074

出　　处：《古生物学报》2003年第2期266-276,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金 (No .49972 0 86 );CNPC储层重点实验室资助项目

摘　　要：在多次赴化石产地陕西横山县进行大规模化石发掘后 ,获得一批完整精美的遗迹标本 ,为其中鱼类游泳遗迹化石标本建立了新种Undichnaprava ,并重新修订了U .britannica ,U .tricosta两种的特征 ,通过遗迹形态恢复鱼体长度为 5 0— 96cm ,普遍大于以往描述的国内外据遗迹标本恢复的鱼体长度。The authors have visited the Hengshan County, Shaanxi Province, China for a large-scale excavation of fossils several times since they first reported the discovery of Mesozoic fish swimming traces. In the Hengshan County, the original locality of the fossils, a set of complete and exquisite trace specimens have been collected. In particular, U. prava, a new ichnospecies, is proposed on the collected specimens. The criteria for the determination of U. britannica and U. tricosta are revised in this paper. The trace forms are used to reconstruct the fish-body to be at 50-96 cm in length, longer than those of the trace specimens reconstructed inside and outside China.

关 键 词：鱼类游泳遗迹 晚三叠世 陕西北部 化石 

分 类 号：Q915[天文地球—古生物学与地层学]