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中文摘要：
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。
英文摘要：
The sauropods are the biggest animals on land in the Mesozoic. They are widely distributed in Jurassic and Cretaceous and evolve very successfully. Sauropod footprint fossils were found from the Early Jurassic to the Late Cretaceous. There are many sauropod footprint fossils were found in three sites in the Early Cretaceous, Huang longgou located the south of Zhucheng, Zhangzhuhewan and Tangdigezhuang located the north of Zhucheng, What are the similarities and differences among three sites of the sauropod dinosaur footprints at Zhucheng area, and do these footprints of the track makers all belong to the same kind of sauropod dinosaurs？ The area ratios of manus/pes prints foot based on a large number of data statistics indicated at least two different sauropods lived in Huanglonggou and Tangdigezhuang. Comparison of sauropods size in different times suggested the trend of evolution, which is the size become more and more smaller. The evolution is the result of changes in the environment.
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