中国的三叠纪海生爬行动物化石及其层位

对中国三叠纪海生爬行动物化石及其产出层位、产地进行了较为系统的分析研究和总结,划分出4个相关的海生爬行动物群:早三叠世南漳海生爬行动物群、中三叠世兴义海生爬行动物群、晚三叠世关岭海生爬行动物群、晚三叠世定日海生爬行动物群.进一步的研究表明,中国三叠纪海生爬行动物化石数量比较丰富,种类多样;特别是贵州关岭地区三叠纪海生化石数量多、保存完整,基本上为原地埋藏,实属国内外同期地层之罕见.中国三叠纪海生爬行动物化石地史分布从早三叠世奥伦尼克期到晚三叠世诺利期都有分布;地理分布主要分布于古东特提斯海域,具有明显的区域性.

Triassic marine reptile fossils and their stratigraphical distribution in China

The marine reptile fossils and their occurrence stractigraphical horizons in China are systematically summarized on the basis of practical materials in this paper.They are divided into four relative faunas as follows.The Early Triassic Nanzhang marine reptile fauna,the Middle Triassic Xingyi marine reptile fauna,the Late Triassic Guanling marine reptile fauna,and the Late Triassic Dingri marine reptile fauna.On the basis of studying,the marine reptile fossils in China have the vast quantity,multiple species and good reservation.Particularly,the Triassic Guanling fauna of Guizhou have vast quantity and good reservation and priority to burial fossils in situ,and may be the first class in the world.The geohistory distribution of the Triassic marine reptile fossils over China is from the Early Triassic Olenekian to the Late Triassic Norian.The geographical distribution of the marine reptile fossils over China is mainly distributed over Paleo-Eastern Tethys,showing a regional feature.