古生物学报
古生物學報
고생물학보
ATCA PALAEONTOLOGICA SINICA
2007年
2期
145-166
,共22页
笔石%湄潭组%奥陶系%黔中古陆%遵义%贵州
筆石%湄潭組%奧陶繫%黔中古陸%遵義%貴州
필석%미담조%오도계%검중고륙%준의%귀주
对贵州遵义高桥大角寺剖面的奥陶系湄潭组下段和中段笔石的研究结果表明,湄潭组下段从下而上可以识别出Didymogra ptellus eobi fidus 带、Corymbogra ptellus deflexus带和Azygogra ptus suecicus带;中段含有一层笔石,缺少特征属种,根据其总体面貌,可能相当于Expansogra ptus hirundo带.文章描述其中11属16种:Pseudo phyllogra ptus angustifolius(Hall),Phyllogra ptus claviger(Monsen),P.anna Hall,Didymogra ptellus eobi fidus(Chen and Xia),D.protoindentus(Monsen),Acrogra ptus kurcki(T(o)rnquist),Corymbogra ptus vacillans(Tullberg,1880),C.deflexus(Elles and Wood),Expansogra ptus extensus(Hall),E.nitidus(Hall),Xiphogra ptus lofuensis(Lee),X.cf.lofuensis(Lee),Azygograptus suecicus Moberg,Dictyonema sp.,Dendrograptus sp.,Inocaulis plumulosus Hall.这一笔石动物群分异度较低,大多数为上扬子区的常见属种,代表当时黔中古陆北缘近岸海洋环境中的笔石动物群面貌.
對貴州遵義高橋大角寺剖麵的奧陶繫湄潭組下段和中段筆石的研究結果錶明,湄潭組下段從下而上可以識彆齣Didymogra ptellus eobi fidus 帶、Corymbogra ptellus deflexus帶和Azygogra ptus suecicus帶;中段含有一層筆石,缺少特徵屬種,根據其總體麵貌,可能相噹于Expansogra ptus hirundo帶.文章描述其中11屬16種:Pseudo phyllogra ptus angustifolius(Hall),Phyllogra ptus claviger(Monsen),P.anna Hall,Didymogra ptellus eobi fidus(Chen and Xia),D.protoindentus(Monsen),Acrogra ptus kurcki(T(o)rnquist),Corymbogra ptus vacillans(Tullberg,1880),C.deflexus(Elles and Wood),Expansogra ptus extensus(Hall),E.nitidus(Hall),Xiphogra ptus lofuensis(Lee),X.cf.lofuensis(Lee),Azygograptus suecicus Moberg,Dictyonema sp.,Dendrograptus sp.,Inocaulis plumulosus Hall.這一筆石動物群分異度較低,大多數為上颺子區的常見屬種,代錶噹時黔中古陸北緣近岸海洋環境中的筆石動物群麵貌.
대귀주준의고교대각사부면적오도계미담조하단화중단필석적연구결과표명,미담조하단종하이상가이식별출Didymogra ptellus eobi fidus 대、Corymbogra ptellus deflexus대화Azygogra ptus suecicus대;중단함유일층필석,결소특정속충,근거기총체면모,가능상당우Expansogra ptus hirundo대.문장묘술기중11속16충:Pseudo phyllogra ptus angustifolius(Hall),Phyllogra ptus claviger(Monsen),P.anna Hall,Didymogra ptellus eobi fidus(Chen and Xia),D.protoindentus(Monsen),Acrogra ptus kurcki(T(o)rnquist),Corymbogra ptus vacillans(Tullberg,1880),C.deflexus(Elles and Wood),Expansogra ptus extensus(Hall),E.nitidus(Hall),Xiphogra ptus lofuensis(Lee),X.cf.lofuensis(Lee),Azygograptus suecicus Moberg,Dictyonema sp.,Dendrograptus sp.,Inocaulis plumulosus Hall.저일필석동물군분이도교저,대다수위상양자구적상견속충,대표당시검중고륙북연근안해양배경중적필석동물군면모.
