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李氏叶肢介(Leaid)在内蒙古上二叠统陶海营子组 的发现及其意义
引用本文:牛绍武,张永生,辛后田,田树刚,邢恩袁,王俊涛,曹 杰,王 猛.李氏叶肢介(Leaid)在内蒙古上二叠统陶海营子组 的发现及其意义[J].地质通报,2013,32(7):967-976.
作者姓名:牛绍武  张永生  辛后田  田树刚  邢恩袁  王俊涛  曹 杰  王 猛
作者单位:1.中国地质调查局天津地质矿产研究所,天津300170; 2.中国地质科学院矿产资源研究所,北京100037; 3.中国地质科学院地质研究所,北京100037
摘    要:2009年8月,在内蒙古大兴安岭地区扎鲁特旗陶海营子重新测制了上二叠统陶海营子组剖面。自下而上共发现3层叶肢介(包括2层李氏叶肢介类Leaid化石),经鉴定为单脊型与双脊型的新种类。在中国,二叠纪的李氏叶肢介类(Leaid)化石前人仅在甘肃肃南县上二叠统肃南组发现过,计2属3种1],其后一直未见报道。这类化石在大兴安岭地区的发现,填补了该时期中国东部李氏叶肢介类(Leaid)分布的空白,为该时期地层的区域对比和时代确定提供了重要的化石证据,具有重要的地层意义。同时,为进一步探讨它们的分布、迁徙、古生态、生物地理区系等增加了实际材料,具有古地理和古构造学上的理论意义。

关 键 词:李氏叶肢介(Leaid)  内蒙古  上二叠统  陶海营子组

The discovery of the Leaid Conchostracan fossils from Upper Permian Taohaiyingzi Formation in Inner Mongolia and Its geological significance
NIU Shao-wu,ZHANG Yong-sheng,XIN Hou-tian,TIAN Shu-gang,XING En-yuan,WANG Jun-tao,CAO Jie,WANG Meng.The discovery of the Leaid Conchostracan fossils from Upper Permian Taohaiyingzi Formation in Inner Mongolia and Its geological significance[J].Geologcal Bulletin OF China,2013,32(7):967-976.
Authors:NIU Shao-wu  ZHANG Yong-sheng  XIN Hou-tian  TIAN Shu-gang  XING En-yuan  WANG Jun-tao  CAO Jie  WANG Meng
Institution:1. Tianjin Institute of Geology and Mineral Resources, China Geological Survey, Tianjin 300170, China; 2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
Abstract:In 1984, the Late Permian Leaid fossils (Conchostraca) were found for the first time by Professor Shen Yanbin in Gansu Provence. Thay occur in the Upper Permian Sunan Formation near Qinglong area of Yugur Autonomous County of Sunan, Gansu Province. In 2009, the Late Permian Leaid fossils were found from Upper Permian Taohaiyingzi Formation by the authors in Taohaiyingzi Town, Jarud Banner of Inner Mongolia. Thay occur in the Upper Permian Taohaiyingzi Formation and are composed of 3 genera and 8 speices, i.e., Bulbileaia orientalis Niu(gen. et sp. nov.), Praemonoleaia elliptica Niu(gen. et sp. nov.), P. oblonga Niu (gen. et sp. nov.), P. ovalis Niu (gen. et sp. nov.), P. rotunda Niu(gen. et sp. nov.), P. subtriangularis Niu (gen. et sp. nov.), P. ampulliformis Niu (gen. et sp. nov.), and Hemicycloleaia curtus Niu (sp.nov.). The carapace volve of genus Bulbileaia Niu (gen.nov.) is small in size and oval in shape, and has one radial ridge in front of the carapace volve of this genus. There are three small tumours on the birth shell of this genus. There is one radial ridge in front of the carapace volve of the genus Praemonoleaia Niu(gen. et sp. nov.). This radial ridge on the carapace volve of this genus is straight, vertical to the dorsal margin of the carapace volve of this genus. It had not achieved the ventral margin of the carapace volve of this genus. According to characteristics of the carapace volve from genus Praemonoleaia Niu (gen.nov.), Bulbileaia Niu (gen.nov.) and Petschoria Zaspelova, a new Subfamily Praemonoleaiinae Niu (subfam. nov.) has been established by the authors. The discovery of the Leaid conchostracan fossils in the Da Hinggan Mountains of Inner Mongolia is of important significance for the correlation and division of strata.
Keywords:Leaid conchostracan fossils  Inner Mongolia  Upper Permian  Taohaiyingzi Formation
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