MICROSCOPIC FOSSILS WITH MULTI-LEVEL TETRAD CELL STRUCTURES FROM THE CAMBRIAN KUANCHUANPU FORMATION IN SOUTHERN SHAANXI
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Abstract:
A large number of multicellular spherical microfossils occur in the phosphorus-bearing strata from the Ediacaran-Cambrian in South China,in which some of the large multicellular spherical fossils are characterized by cell cleavage. The affinity and classification of these spherical fossils have been controversial for a long time due to the lack of effective anatomical information.Here we report exceptional spherical and non-spherical fossils characterized by specific multi-level,tetrad cell structures from the Kuanchuanpu Formation in southern Shaanxi.These spherical fossils are likely akin to multicellular algae in comparison with cooccurred animal embryos in the cleavage stage and algal fossils with tetrad structures from the Ediacaran Weng’an biota in South China.