Wengania globosa在陕西勉县茶店陡山沱组磷块岩中的发现

本文报道陕西勉县茶店陡山沱组磷块岩中的疑源多细胞生物化石，其中Ｗｅｎｇａｎｉａｇｌｏｂｏｓａ属于首次报道。勉县茶陡山组磷块岩中的化石组合与贵州瓮安陡山沱组与可以直接对比，进一步了此两地的磷块岩属同期沉积产物。这一发现表明新元古代磷块岩中可能保存了多细胞生物早期演化中最精采的章节，因而进一步深入研究陡山沱组磷块岩大有必要。本文还讨论了疑在Ｍｅｇｈｙｓｔｒｉｃｈｏｓｐｈａｅｒｉｄｉｕｍ ｃｈａｄｉａｎ

THE DISCOVERY OF Wengania globosa IN DOUSHANTUO PHOSPHORITES IN CHADIAN, SHAANXI PROVINCE

The acritarch Meghystrichosphaeridium chadianensisand,for the first time,the mul- ticellular eukaryote Wengania globosa are described from the Doushantuo phosphorites in Chadian,Mianxian,Shaanxi Province. The phosphatized fossil assemblage in Chadian shows a close similarity to that of the Doushantuo phosphorites in Weng' an,Guizhou Province,confirming their coevality.The discovery of a second locality of the Weng' an- type Doushantuo Lagerstatte in Chadian testifies that perhaps the most importantchapter in the early evolution of multicellularity can be retrieved from Neoproterozoic phospho- rites,and urges more systematic and detailed study on Doushantuo phosphorites in South China.The paleoecology and biological affinities of Meghystrichosphaeridium chadianensis and Wengania globosa remain uncertain