Swapan K Sahoo, Noah J Planavsky, Brian Kendall, Xinqiang Wang, Xiaoying Shi, Clint Scott, Ariel D Anbar, Timothy W Lyons, Ganqing Jiang

2012/9/27

Nature

489

7417

546

Nature Publishing Group

Abstract Metazoans are likely to have their roots in the Cryogenian period, but there is a
marked increase in the appearance of novel animal and algae fossils shortly after the
termination of the late Cryogenian (Marinoan) glaciation about 635 million years ago. It has
been suggested that an oxygenation event in the wake of the severe Marinoan glaciation
was the driving factor behind this early diversification ofmetazoans and the shiftin
ecosystemcomplexity. But there is little evidence for an increase in oceanic or atmospheric ...