昆明地区早寒武世三叶形虫新属——PanlongiaLiu et Luo gen.nov.  

PANLONGIA, A NEW TRILOBITOMORPH GENUS FROM THE LOWER CAMBRIAN, KUNMING, YUNNAN

作　　者：刘琦[1] 罗惠麟[2] 陈良忠[2] 胡世学[2] 

机构地区：[1]中国地质大学(武汉)地球科学学院,武汉430074 [2]云南省地质科学研究所,昆明650051

出　　处：《古生物学报》2006年第3期384-392,共9页Acta Palaeontologica Sinica

摘　　要：简述早寒武世关山动物群的研究现状及重要意义。重点描述该动物群中一三叶形虫新属PanlongiaLiuetLuogen.nov.及其两个新种:即个体小、拥有等大的头甲和尾甲、边缘没有明显突出刺状物的PanlongiatetranodusaLiuetLuogen.etsp.nov.及头甲后侧和尾缘具刺的PanlongiaspinosaLiuetLuogen.etsp.nov.。三叶形虫在关山动物群中的首次发现为寒武纪生命大爆发以及古地理、古板块恢复的研究提供了有益的证据。A new genus Panlongia Liu et Luo gen. nov. is erected for the trilobitomorph first found in the Guanshan fauna. The genus is a helmetiid-like animal, as indicated by the presence of a rostral structure in the cephalon and a probably completely fused tergal shield with segmental boundaries well visible, particularly in the thorax, which is unusually well-defined and contains only four segments. The term ＂Guanshan fauna＂ was introduced by Luo Huilin et al. in 1999. It contains many metazoan fossils, including some of the taxa known from the Chengjiang fauna, for instance worms, Isoxys, vetulicolians, Palaeoscolex etc. （Luo et al. , 1999）. In the Guanshan fauna, these elements are associated with the trilobite genera Redlichia and Palaeolenus, index taxa for the Wulongqing Formation in eastern Yunnan （Luo etal. , 1994）. However, there is a striking difference between the Guanshan and Chengjiang faunas at species level. In recent years numbers of new Guanshan species have been found in such genera as Vetulicola, Tuzoia,Luo Huilin et al. in 1999. It contains many metazoan fossils, including some of the taxa known from the Chengjiang fauna, for instance worms, Isoxys, vetuli- colians, Palaeoscolex etc. （Luo et al. , 1999）. In the Guanshan fauna, these elements are associated with the trilobite genera Redlichia and Palaeolenus, index taxa for the Wulongqing Formation in eastern Yunnan （Luo etal. , 1994）. However, there is a striking difference between the Guanshan and Chengjiang faunas at species level. In recent years numbers of new Guanshan species have been found in such genera as Vetulicola, Tuzoia,Palaeoscolex, Heliomedusa, and of sponges. The Guanshan fauna is younger than the Early Cambrian Chengjiang fauna （e. g. , Hou et al. , 1999, Luo et al. , 1999）, and somewhat intermediate in character between the latter and the Middle Cambrian Kaili fauna （Zhao et al. , 1994）. The study of the Guanshan fauna started six years ago. This fauna adds new information on life during the Camb

关 键 词：关山动物群 三叶形虫Panlongia Liu ET Luo GEN.NOV 早寒武世 昆明 

分 类 号：Q915[天文地球—古生物学与地层学]