ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
中三叠世安尼期罗平生物群海生爬行类研究新进展
  
关键词:Luoping Biota  Lagerstätten  Anisian  recovery  macropredator  ecosystem
基金项目:中国地质调查局工作项目(编号: 12120114030601; 12120114068001; 1212011140051; 1212010610211)
作者单位E-mail
文芠 中国地质调查局成都地质调查中心 wenwen2020240@163.com 
张启跃 中国地质调查局成都地质调查中心 yxzqy@sina.com 
刘俊 合肥工业大学  
胡世学 中国地质调查局成都地质调查中心  
周长勇 中国地质调查局成都地质调查中心  
黄金元 中国地质调查局成都地质调查中心  
谢韬 中国地质调查局成都地质调查中心  
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摘要:
New Progress in the Study of Marine Reptiles from the Luoping Biota of Middle Triassic Anisian Period
      The Luoping Biota was discovered in 2007 by the Chengdu Center of China Geological Survey during 1:50000 regional mapping works at Dawazi Village, Luoxiong Town, 15 km southeast of Luoping City, Yunnan Province. The interval containing the Luoping biota is the middle to upper part of Member II of the Guanling Formation. The fossil assemblage of the Luoping biota is a mixture of marine animals, terrestrial plants and a few terrestrial animals. To date, more than ten fossil groups have been recovered, which include marine reptiles, fishes, arthropods, echinoderms, ammonites, bivalves, gastropods, lingulid brachiopods, foraminifers, and plants. The Luoping Biota is one of the most diverse Triassic marine fossil Lagerst?tten records in the world. The age of the Luoping biota is assigned to the Pelsonian Substage of the Middle Triassic Anisian Stage based on the index conodont Nicoraella Kockeli. Well-preserved, diverse marine reptiles are one of the highlights of the Luoping biota, including ichthyosaurs, sauropterygians, protorosaurs and archosauromorphs. Mesozoic is remarkable for marine reptiles, whose swimming modes, however, remain a topic of much controversy because of the absence of their tracks. Hundreds of seabed tracks found in Luoping Biota, which were assigned to Dikoposichnus luopingensis, provide new materials for the study of their locomotive mode. Besides, the macropredator Nothosaurus zhangi reported from Luoping Biota also supports the existence of the makers of Dikoposichnus luopingensis. The skull of Nothosaurus zhangi is the largest sauropterygian ever reported in Triassic. The occurrence of a different assemblage of marine reptiles as top predators in the food web indicates a well developed marine ecosystem, showing full rebuilding of the marine ecosystem after the mass extinction that happened about 250 million years ago.
WEN Wen,ZHANG Qi-yue,LIU Jun,HU Shi-xue,ZHOU Chang-yong,HUANG Jin-yuan,XIE Tao.2015.New Progress in the Study of Marine Reptiles from the Luoping Biota of Middle Triassic Anisian Period[J].Acta Geoscientica Sinica,36(4):385-393.
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