三叠纪鳍龙类的地层分布及其演化THE STRATIGRAPHIC DISTRIBUTION,MIGRATION AND PHYLOGENY OF THE TRIASSIC SAUROPTERYGIANS
季承
摘要(Abstract)：
三叠纪的鳍龙类主要在近岸浅水环境中生活,多数分布在特提斯洋区,而在北美地区极少且仅发现两属。近年来我国华南地区发现的多层位保存的三叠纪鳍龙类材料为探讨鳍龙类的起源、迁移与演化提供了新的信息,同时也向传统的认识提出了挑战。目前三叠纪鳍龙类的地层发生序列与演化谱系之间仍然存在矛盾,基于系统演化研究得出的西特提斯区起源说与我国近年来在安徽巢湖的新发现不完全一致。这主要是由于其地层产出序列以及化石保存不完整所致,未来有待于在我国以及世界其他更古老地层中化石材料的发现,以及基于所有标本对三叠纪鳍龙的谱系演化的系统认识。
关键词(KeyWords)： 生物地层;鳍龙类;起源;迁移;系统演化;三叠纪;特提斯洋区;古太平洋区
基金项目(Foundation): 中国科学院南京地质古生物研究所“一三五”部署学科建设项目(Y321080701)资助
作者(Author): 季承
DOI: 10.19839/j.cnki.dcxzz.2014.02.008
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