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本文系统研究了广西南垌早石炭世巴平组下段丰富的牙形刺,识别出Siphonodella duplicata,S.cooperi,S.obosoleta,S.quadruplicata,S.lobata,S.crenulata,S.sandbergi,S.eurylobata,S.isosticha,Gnathodus delicatus等重要的带化石。首次报道和描述了产自Siphonodella crenulata带下部牙形刺新材料,其中确立一新种:Siphonodella nandongensis sp.nov.Li;一新未定种:Siphonodellasp.nov.A;且修订了Siphonodella trirostrata Druce(1969)的含义。依据上述牙形刺:Siphonodella nandongensis sp.nov.Li;Siphonodellasp.nov.A和Siphonodella trirostrata Druce(1969)发育特征,认为Siphonodella nandongensis sp.nov.Li与Siphonodella sexplicata;Siphonodella sp.nov.A与Siphonodella quadruplicata(Branson et Mehl);Siphonodella trirostrata Druce(1969)与Siphonodella sandbergi Klapper演化关系密切,并确定所描述的化石新材料的层位是Siphonodella crenulata带下部,地质时代为早石炭世早期,为进一步精细地层划分提供了翔实资料。
In this paper, we have systematically studied the abundant conodonts in the lower Pampanga Formation of the Early Carboniferous in Nanxun, Guangxi, and identified Siphonodella duplicata, S.cooperi, S.obosoleta, S.quadruplicata, S.lobata, S.crenulata, S.sandbergi, S .eurylobata, S.isosticha, Gnathodus delicatus and other important fossils. A new species of conodont from the genus Siphonodella crenulata was first reported and described. Among them, a new species was identified: Siphonodella nandongensis sp.nov.Li; a newly undetermined species: Siphonodellasp.nov.A; and Siphonodella trirostrata Druce (1969) ). According to the above conodonts: Siphonodella nandongensis sp. Nov.Li; Siphonodellasp.nov.A and Siphonodella trirostrata Druce (1969), Siphonodella nandongensis sp.nov.Li and Siphonodella sexplicata; Siphonodella sp.nov.A and Siphonodella quadruplicata (Branson et Mehl); Siphonodella trirostrata Druce (1969) is closely related to the evolution of Siphonodella sandbergi Klapper, and the layer of new fossil material described is identified as the lower Siphonodella crenulata zone and the geologic age is Early Early Carboniferous. For further fine stratigraphic division Provided detailed information.