山东诸城地区蜥脚类恐龙足迹研究

发布时间：2018-12-09 10:23

【摘要】：蜥脚类恐龙是中生代时期陆地上最大的动物,作为广泛分布于侏罗纪和白垩纪的一种进化十分成功的恐龙,蜥脚类足迹也是分布较广,从早侏罗世到晚白垩世的地层中都有发现。诸城地区南部皇龙沟莱阳群、北部张祝河湾及棠棣戈庄大盛群中发现了三处早白垩世时期数量不等的恐龙足迹化石,这三处化石点都发现了蜥脚类的恐龙足迹化石。诸城地区三处的蜥脚类恐龙足迹之间有什么异同呢?这些足迹的造迹者都属于同一种蜥脚类恐龙吗?本文在大量的数据统计基础上,根据前后足的面积比对蜥脚类足迹进行了初步分类,推测早白垩世早期的皇龙沟及早白垩世晚期的棠棣戈庄都至少生活有两种不同的蜥脚类恐龙,证实了蜥脚类群居生活的特性。对三处不同时期蜥脚类恐龙体型的对比总结出蜥脚类体型趋小化的演化趋势,并分析认为环境的变化是演化的动力机制。对白垩纪恐龙物种的更替,古环境变化等多方面问题进行了探讨。
[Abstract]:Sauropods were the largest terrestrial animals in Mesozoic. They were widely distributed in Jurassic and Cretaceous. From the early Jurassic to the late Cretaceous strata have been found. Three dinosaur footprints of the early Cretaceous period have been found in the southern Huanglonggou Laiyang Group, Zhangzhu Bay and Tangdige Zhuangdasheng Group in the south of Zhucheng area, and all three fossils of sauropods have been found in these three fossil sites. What are the similarities and differences between the footprints of the three sauropods in Zhucheng? Do the tracks belong to the same sauropod dinosaur? Based on a great deal of data and statistics, the footprint of sauropods has been preliminarily classified according to the area ratio of forefoot and forefoot. It is inferred that there were at least two species of sauropods living in Huanglonggou early Cretaceous and Tangdigozhuang in late Cretaceous which confirmed the characteristics of sauropods living in groups. Based on the comparison of three sauropods in three different periods, the evolution trend of sauropods was summarized, and the dynamic mechanism of evolution was found to be the change of environment. The changes of species and paleoenvironment of the Cretaceous dinosaurs were discussed.
【作者单位】：诸城市恐龙文化研究中心;山东省地质科学研究院;昆明理工大学国土资源工程学院地球科学系;
【基金】：中国地质调查局项目(编号:DD15-034) 国家自然基金资助项目(编号:41272021,41372109,90914003)的成果~~
【分类号】：Q915

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