CAJ | 학술논문

通过资料整理和野外调查，本文认为南漳/远安动物群是产自于嘉陵江组三段顶部纹层状灰岩、微晶灰岩中，以海生爬行动物为特色，伴有大量菌藻类和软体动物的早三叠世奥伦尼克期Spathian晚期的动物群落。该动物群中的海生爬行动物为幻龙类-鱼龙类-汉江蜥-贵州龙-湖北鳄类的组合特征。湖北鳄类相对其他海生爬行动物类型，数量最多，多样性最为丰富。独特的骨骼特征暗示其位于脊椎动物食物链的最低层。大量分异度较高的海生爬行动物在同一群落中出现，暗示在Spathian晚期，海洋生态系统可能已经开始恢复。
통과자료정리화야외조사，본문인위남장/원안동물군시산자우가릉강조삼단정부문층상회암、미정회암중，이해생파행동물위특색，반유대량균조류화연체동물적조삼첩세오륜니극기Spathian만기적동물군락。해동물군중적해생파행동물위환룡류-어룡류-한강석-귀주룡-호북악류적조합특정。호북악류상대기타해생파행동물류형，수량최다，다양성최위봉부。독특적골격특정암시기위우척추동물식물련적최저층。대량분이도교고적해생파행동물재동일군락중출현，암시재Spathian만기，해양생태계통가능이경개시회복。
Nanzhang/Yuanan Fauna, which is yielded in the laminated limestone and micrite at the top of 3rd member of Jianglingjiang Formation, is characterized by marine reptiles, together with some Homoneneae and mollusk. The age of Nanzhang/Yuanan Fauna is late Olenekian Spathian of Early Triassic. The assemblage of marine reptiles in this fauna comprises Hupehsuchia, Ichthyosauria (Chaohusaurus), and Eosauropterygia (Hanosaurus, Keichousaurus, and Nothosauridae). Compared with other marine reptiles, Hupehsuchia has most abundance and diversity in this fauna. The high specialized skeleton of Hupehsuchia indicates that this animal should exist at the bottom of marine reptiles’food chain. A lot of marine reptiles lived in Nanzhang/Yuanan Fauna, which indicates that marine ecosystem should begin recovery in late Spathian after late Permian mass extinction.