Yangtzedonta is Undoubtedly a Junior Synonym of Xianfengella

With the verification of the type specimen by six experts from the Nanjing Institute of Geology and Palaeontology, the specimen of Xianfengella prima He and Yang, 1982 described by Qian (Qian, 2001, flge2: la-c) is confirmed to be the holotype specimen (NIGP. 84430) of Yangtzedonta primitiva Yu, 1985, and consequently, Yu Wen's view that they are not the same specimen is impractical. This fact demonstrates that Yangtzedonta primitiva Yu, 1985 is undoubtedly a junior synonym of Xianftngella prima He and Yang, 1982, and is invalid. Qian's conclusion (Qian, 2001)that no bivalve appeared in the early Meishucunian Stage of the Early Cambrian is rational.

作 者： QIAN Yi   作者單位： Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing, Jiangsu 210008  刊 名： 地質(zhì)學(xué)報(bào)（英文版）  SCI 英文刊名： ACTA GEOLOGICA SINICA  年，卷(期)： 2005 79(6)  分類號(hào)： P5  關(guān)鍵詞： Yangtzedonta primitiva   Xianfengella prima   junior synonym   Meishucunian   Cambrian  

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