A LATE PERMIAN TO EARLY TRIASSIC BIVALVE FAUNA FROM THE DONGPAN SECTION, SOUTHERN GUANGXI, SOUTH CHINA
A LATE PERMIAN TO EARLY TRIASSIC BIVALVE FAUNA FROM THE DONGPAN SECTION, SOUTHERN GUANGXI, SOUTH CHINA
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DOI：
10.1666/pleo05-158.1
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发表时间：
2007-09
期刊：
影响因子：
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通讯作者：
Weihong He;Q. Feng;E. Weldon;Songzhu Gu;Youyan Meng;F. Zhang;Shunbao Wu
中科院分区：
文献类型：
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作者：
Weihong He;Q. Feng;E. Weldon;Songzhu Gu;Youyan Meng;F. Zhang;Shunbao Wu
摘要本文描述了广西东盘剖面二叠-三叠系双壳类动物群。双壳类动物区系包括10属16种。新分类群为扶绥真、钦州古和刘桥白。层段12（大隆组）含有典型的晚二叠世晚期菊石：Huananoceras sp.，莱宾角石属L. compressum Yang和Qiangjiangoceras sp.13层（罗楼组）含有典型的早三叠世双壳类Claraia dieneri Nakazawa、C.参见C. wangi（Patte），和C. griesbachi（Bittner），与最早的三叠纪菊石Ophiceras sp.共存。东盘剖面的双壳类和菊石分布表明，12层应归属于晚二叠世，13层应归属于早三叠世。从长兴早期到印度纪，克拉依亚种的深海切迹逐渐变窄，由腹向延伸变为水平延伸。在这段时间里，克拉莱亚的物种多样性也在增加。
Abstract A bivalve fauna from the Permian—Triassic interval of the Dongpan section, Guangxi, South China is described herein. This bivalve fauna includes 16 species belonging to 10 genera. New taxa are Euchondria fusuiensis, Palaeoneilo qinzhouensis, and Claraia liuqiaoensis. Bed 12 of the interval (Talung Formation) contains the typical late Late Permian ammonoids: Huananoceras sp., Laibinoceras cf. L. compressum Yang, and Qiangjiangoceras sp. Bed 13 (Luolou Formation) contains typical Early Triassic bivalves Claraia dieneri Nakazawa, C. cf. C. wangi (Patte), and C. griesbachi (Bittner), which coexist with the earliest Triassic ammonoid Ophiceras sp. The bivalve and ammonoid distributions at the Dongpan section indicate that bed 12 should be assigned to the Late Permian, and bed 13 should be assigned to the Early Triassic. From the early Changhsingian to the Induan, the byssal notches of Claraia species tend to become progressively narrower, and change from being ventrally extended to being horizontally extended. The species level diversity of Claraia also increases through this interval.