四川资中金李井镇肉食龙足迹化石再研究  

RESTUDY ON CARNOSAURS FOOTPRINT FOSSIL IN JINLIJING TOWN OF ZIZHONG COUNTY,SICHUAN PROVINCE

作　　者：杨春燕[1] 李奎[1] 蒋兴奎 刘建[1] 乌尼拉哈 司毅 

机构地区：[1]成都理工大学博物馆,成都610059 [2]四川省地勘局404地质队,四川西昌615000

出　　处：《古生物学报》2013年第2期223-233,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金项目(编号:40572016);成都理工大学青年研究基金资助

摘　　要：重新观察和修订发现于四川资中县金李井镇碾盘山村中侏罗统沙溪庙组中的碾盘山金李井足迹(Jin-lijingpus nianpanshanensis Young and Young,1987),将其归属于实雷龙足迹属,种名保留,更名为碾盘山实雷龙足迹(Eubrontes nianpanshanensis comb.nov.)。新足迹种的特征为:足迹长大于足迹宽,行迹1的足迹长39.8cm,足迹宽33.7cm,行迹2的足迹长26cm,足迹宽24.2cm。足迹深度在2.5—3.0cm之间,无前足迹,两足行走,三趾型,趾行式,趾端具爪,Ⅲ趾最长。两条行迹的趾间角分别为Ⅱ25°Ⅲ33°Ⅳ和Ⅱ29°Ⅲ30.6°Ⅳ。单步长与足迹长之比为2.5,行迹外宽与足迹宽之比为1.5,复步角约为160°。从足迹的形态、大小和深度以及行迹的方向和速度来看,这两条行迹的造迹恐龙之间可能有某种亲缘关系。This paper observed and revised Jinlijingpus nianpanshanensis Young et al. 1987, from the Shaximiao Formation （Middle Jurassic） of Nian- panshan village, Jinlijing Town, Zizhong County, Siehuan Province. The footprints are classified as Eubrontes ichnogen. , and are recombine as Eubrontes nianpanshanensis comb. nov. The characteristics of the new footprints are as follows： length is longer than wide, the size of the first traekway＇s footprints is 39.8 cm long and 33.7 cm wide in average, while the second trackway＇s foot-prints＇ is 26 cm long, 24. 2 cm wide in average. The depth of two trackways＇ footprints between at 2. 5-3.0 cm, no manus tracks. Footprint-makers were bipedal, with three-toed feet, with claw at toe-end, digitigrade dinosaurs. Toe Ⅲ is the longest toe. Two trackways＇ divaricate angle of digits are Ⅱ25°Ⅲ33°Ⅳ and Ⅱ29°Ⅲ30.6°Ⅳ respectively. Ratio of pace length and footprint length is 2. 5, ratio of external trackway width and footprint width is 1. 5, pace angulation （degrees） is about 160°. According to footprints＇ shape, size, depth, direction and speed, it is concluded that the footprint-makers of those two trackways may be have some genetic relationship.

关 键 词：恐龙 肉食龙足迹 中侏罗统 四川资中 

分 类 号：Q915.2[天文地球—古生物学与地层学]