幕府山(Mufushanella)在西藏申扎地区中二叠统的发现  

DISCOVERY OF MUFUSHANELLA FROM THE MIDDLE PERMIAN IN XAINZA AREA OF TIBET

作　　者：程立人[1] 张予杰[2] 张以春[1] 吴水忠[3] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]成都地质矿产研究所,成都610082 [3]东北大学秦皇岛分校,秦皇岛066004

出　　处：《古生物学报》2005年第1期74-78,共5页Acta Palaeontologica Sinica

基　　金：中国地质调查局国土资源大调查项目(No. 20001300009141)资助课题

摘　　要：Mufushanella是陈旭教授 1964年创立的,以侧坡内凹、外部壳圈具列孔区别于Nankinella。该属成立与否曾有多人讨论过,争论焦点在于建属时所谓列孔是否与隔壁孔一样,有待进一步证实。采自西藏申扎地区的标本证实了确实是列孔。而且在外部壳圈两列孔之间发育有类似拟旋脊状暗色物质聚集,可能是拟旋脊的“雏形”。并建立新种Mufushanellanankinellaeformissp.nov.The genus Mufushanella was established by Chen Shu in 1964. The difference from Nankinela is that it has convex slope and foramen in outer volution. Whether the Mufushanella is tenable or not has been discussed by some people for a long time. It was the focus of the debate that whether the so-called “foramen” are actually septal pores. The specimens collected from Xainza area of Tibet have confirmed the presence of foramen in Mufushanella, which are not septal pores, so we suppose that Mufushanella is a distinct genus. Besides, in the specimens develops the acummulation of dark material between two foramen in outer volutions which recalls parachomata, and seems to be its embryonic form. And a new species Mufushanella nankinellaeformis sp.nov. was established.

关 键 词：幕府山蜓 西藏 申扎地区 中二叠统 列孔 隔壁孔 化石 新种 

分 类 号：Q911[天文地球—古生物学与地层学]