Description of A New Fossiliferous Locality of the Chengjiang  Biota from Malong in Qujing

Abstract

Abstract: This paper describes five species of arthropods and one species of hyoliths: Malungia laevigata, Wutingaspis malungensis, Naraoia longicaudata, Kunmingella sp., Branchiocaris? Yunnanensis, and Triplicatella opimus, collected from the lower part of the Yuanshan member of the Heilinpu Formation (Lower Cambrian) of the new outcrop of Malong, Qujing. All specimens are preserved without soft-part. The specimens of Malungia laevigata are in the highest number, with nearly complete dorsal exoskeletons, having different individual size in holaspid period, while in Wutingaspis malungensis, only cephalic shields are preserved. Compared with the specimens from the middle part of the Yuanshan member, the Heilinpu Formation of Kuangshan section, Malong, the geological age of the new fossiliferous locality is a bit older than Kuangshan section, indicating the first occurrence of Wutingaspis malungensis is earlier than previously speculated. The different diversity of species between the new fossiliferous locality and Kuangshan section provides new information for the study of spatial variation in species diversity and biotic composition of the Chengjiang Biota in southern Yunnan.

Key words: Malong, the Early Cambrian, Chengjiang Biota, morphology

CLC Number:

Q911.2

MA Xinying, WANG Jiaqi, NI Lingmei. Description of A New Fossiliferous Locality of the Chengjiang Biota from Malong in Qujing[J]. Journal of Qujing Normal University, 2024, 43(6): 29-41.

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Description of A New Fossiliferous Locality of the Chengjiang Biota from Malong in Qujing

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