新疆鄯善中侏罗世巨型蜥脚类恐龙的发现  

A new gigantic sauropod dinosaur from the Middle Jurassic of Shanshan,Xinjiang

作　　者：吴文昊[1,2] 周长付[3] Oliver Wings 关谷透 董枝明[2,3,7] 

机构地区：[1]吉林大学古生物学与地层学研究中心,长春130026 [2]吉林大学东北亚生物演化与环境教育部重点实验室,长春130026 [3]沈阳师范大学古生物学院,沈阳110034 [4]德国下萨克森州立博物馆,汉诺威30169 [5]德国柏林自然博物馆,柏林10115 [6]日本福井县立恐龙博物馆 [7]中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《世界地质》2013年第3期437-446,共10页World Geology

基　　金：教育部与国家外专局古生物演化与环境变迁学科创新引智基地项目(B06008);国家自然科学基金(41202012)联合资助

摘　　要：本文首次报道了鄯善地区中侏罗统齐古组产出一新的、原地保存的巨型蜥脚类恐龙—鄯善新疆巨龙(Xinjiangtitan shanshanesis gen.et sp.nov.)。其特征为:倒第2节颈椎在腹侧后1/4处向后发育一条棱嵴,并在后关节面下形成一小的半圆形突;最后两节颈椎很长(其长度之和为股骨、胫骨长度之和的63%);第1荐肋不参与构成荐椎轭;股骨非常粗壮(远端最大宽度为股骨长度的33%)。支序分析显示新疆巨龙(新属)与马龙溪龙互成姊妹群,无疑为马门溪龙科中的一个新的分类群。但新疆巨龙(新属)还具有一些更接近于梁龙类的特征,包括发育明显的栖肌突、较短的后肢和股骨第4转子位于股骨后侧内缘等。新疆巨龙(新属)的体长推算为30～32 m。A new gigantic sauropod dinosaur, Xinjiangtitan shanshanesis gen. et sp. nov. is reported with pre- liminary descriptions. It is well preserved in situ and discovered from the Middle Jurassic Qigu Formtion in Shans- han of Xinjiang for the first time. Xinjiangtitan （gen. nov. ） is characterized by a ventral keel developed on the penuhimated cervical centrum and formed a small semi-circular process under the distal articular facet, last two cer- vical vertebrae are particularly elongated （ ratio ＂length of the last two cervical vertebrae / length of femur and tibi-a＂ is 0. 63 ）, sacricostal yoke excepting the first sacral rib, and extremely robust femur （ratio ＂transverse width of the distal end / femur length＂ is 0. 33 ）. Cladistic analysis places Xinjiangtitan as the sister group of Mamenchisau- rus. Xinfiangtitan is definitely a new taxon of mamenchisaurid dinosaur. However, Xinjiangtitan developed several diplodocid-like characters ： prominent ambiens process of pubis, relatively short hind limb and caudomedially devel- oped fourth trochanter on femoral body. The total body length of Xinjiangtitan is calculated as 30 -32 meters.

关 键 词：新疆 鄯善 鄯善新疆巨龙 中侏罗世 齐古组 马门溪龙科 蜥脚类 

分 类 号：P534.52[天文地球—古生物学与地层学] Q915.2[天文地球—地质学]