奥陶纪三叶虫Omeipsis zhenxiongensisLuo,1974的新材料(英文)  

NEW MATERIAL OF ORDOVICIAN TRILOBITE OMEIPSIS ZHENXIONGENSIS LUO, 1974

作　　者：罗惠麟[1] 周志毅[2] 

机构地区：[1]云南省地质科学研究所,昆明650011 [2]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2004年第3期420-423,共4页Acta Palaeontologica Sinica

基　　金：国家自然科学基金 (No .40 2 72 0 0 1)资助课题

摘　　要：对滇东镇雄羊场桃子崖 (北纬 2 7°36′5 3″,东经 10 4°37′4 2″)和芒部刘家沟 (北纬 2 7°36′2 2″,东经 10 4°5 2′30″)早奥陶世晚期湄潭组下部所产OmeipsiszhenxiongensisLuo ,1974新材料作了研究 ,得以揭示OmeipsisKobayashi,195 1的完整形态特征。该属除尾部具有一长一短两对边缘刺外 ,其头鞍向前逐渐扩张并发育有粗壮前刺。RenhuaiaYininYinandLi,1978应为Omeipsis的晚出异名 ,因为两者头盖并无显著差异。Omeipsis is an endemic trilobite genus typical of the Ordovician Yangtze Block. It occurs only rarely in the Arenig of the Ordovician in association with inner shelf clastic facies. The genus was erected by Kobayashi (1951) on the basis of Acidaspis huangi Sun, 1931. Since then, only one more species, O. zhenxiongensis Luo, has further been referred to it.

关 键 词：奥陶纪 三叶虫 滇东镇 云南 形态特征 

分 类 号：Q915[天文地球—古生物学与地层学]