滇西中奥陶世腕足类两新属  

TWO NEW BRACHIOPOD GENERA FROM THE SHIHTIEN FORMATION (UPPER MIDDLE ORDOVICIAN) OF WESTERN YUNNAN,SOUTHWEST CHINA

作　　者：许汉奎[1] 

机构地区：[1]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》2013年第3期345-351,共7页Acta Palaeontologica Sinica

摘　　要：滇西保山、施甸一带中奥陶统施甸组产有许多腕足类化石,尤其是保山县蒲缥孔雀寺剖面施甸组出露较完整,腕足类分异度较高,但这些过去少有报道,腕足类两新属Pupiaoia和Baoshanella就发现于施甸和保山县的施甸组,前者属正形贝超科,因其壳饰及内部构造较特别,故建立Pupiaoidae新科;后者属德姆贝类的Portranellidae科。与两新属共同产出的腕足类有Protoskenidioides,Lepidorthis,Sulcatorthis,Saucrorthis,Martellia等,三叶虫为Actinopeltis,Illaenus,Birmanites等,笔石为Didymograptus murchisoni Bcek,D.cf.acutus Ekstrom,D.nanus Lapworth等,故该动物群的确切年代应属中奥陶世Darriwilian中晚期。Summary One new family （Pupiaoidae） and two new genera（Pupiaoia and Baoshanella）of brachiopods are established from the Shihtien Formation （upper Darriwilian, Middle Ordovician） of Shidian and Baoshan counties of western Yunnan. The $hihtien Formation contains many other brachiopods and some graptolites, trilobites etc. Pupiaoia gen. nov. is assigned to Orthoidea. It is substantially different from other genera among this superfamily in shell outline, ornamentation and cardinalia, therefore a new family Pupiaoidae is established based on this new genus. Baoshanella is attributed to Potranellidae of Dalmanelloidea.

关 键 词：腕足类 新属 施甸组 中奥陶世 滇西西部 

分 类 号：Q915[天文地球—古生物学与地层学]