| 豫西早寒武世辛集组的一个双壳类 |
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| 引用本文： | 陈忆元
,王自强.豫西早寒武世辛集组的一个双壳类[J].地球科学,1985(2). |
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| 作者姓名： | 陈忆元 王自强 |
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| 作者单位： | Wuhan college of Geology，Wuhan 430074 |
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| 摘 要： | 本文所描述的双壳类卵形波杰特蛤(新种)Pojetaia ovata(sp.nov.)系采自河南方城杨楼辛集组上部灰岩之底部的碎屑灰岩层,位于Bergeroniellus层位之下。其时代应属早寒武世沧浪铺早期。可与澳大利亚南部产有Pojetaia runnegari Jell的地层相对比。本种是我国目前最低层位的双壳类。
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| 关 键 词： | 豫西 早寒武世 古老双壳类 |
A BIVALVE OF THE LOWER CAMBRIAN XINJI FORMATION IN WESTERN HENAN PROVINCE |
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| Chen Yiyuan Wang Ziqiang.A BIVALVE OF THE LOWER CAMBRIAN XINJI FORMATION IN WESTERN HENAN PROVINCE[J].Earth Science-Journal of China University of Geosciences,1985(2). |
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| Authors: | Chen Yiyuan Wang Ziqiang |
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| Abstract: | This paper describes a new bivalve species Pojetaia ovata (sp. nov.). It was collected from the Lower Cambrian Xinji Formation at Yanglou. Fangcheng County, Henan province. It was obtained by means of dilute acetic acid etching .This species appears in the bottom of upper part of Xinji Formation. The P.ovata horizon appears to be coeval with the lower part of Tsanglangpu Stage, because the overlying layer produces Bergeroniellus.So far as we know it is the oldest bivalve found in China. Pojetaia ovata(sp. nov.) (p1. 1, figs. 1-14). Diagnosis: Shell Small (l-2mm.),oviform in lateral view.Umbo a little extruding beyond dorsal margin,slightly prosogyral. Shell with small posterior auricle. It has one or two teeth and corresponding sockets in each valve which may sometimes be transposed. |
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| Keywords: | oldest bivalve Lower Cambrian western Henan province |
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