WANG Shang-yan. 1991: SEVERAL NEW TRACE GENERA. Geological Bulletin of China, (3): 285-288+252.
    Citation: WANG Shang-yan. 1991: SEVERAL NEW TRACE GENERA. Geological Bulletin of China, (3): 285-288+252.

    SEVERAL NEW TRACE GENERA

    • Three new trace genera and four trace species are established. While ddseribing the features of various genera and species, this paper concentrates on the the analysis of the modes of formation of various genera and their significance for the environments.
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