supported by the Chinese Academy of Sciences(Grant Nos.XDB26000000,XDB10010100);the Ministry of Science and Technology of China(Grant Nos.2013FY111000,2017ZX05036-001-004);the National Natural Science Foundation of China(Grant No.41772005);IGCP project 653’The Onset of the Great Ordovician Biodiversification Event’.
The originations of marine planktons and nektons are significantly delayed than that of benthos,as evidenced by the fossil record.The Cambrian Explosion produced a variety of high-level marine organisms,and many remar...