寒武纪大爆发与动物树的成型-地球科学与环境学报-长安大学.PDF

31 2 Vol.31 No.2 2009 6 Journal of Earth Sciences and Environment Jun.2009 舒 德 干1, 2, 3 (1., 710069;2. , 710069; 3., 100083) :“”()、3 。 ——3 , ( ), “”(), 。 ( TOA)。 , 3 3 3 。 6 (、、、、) , , , 。, “”, “”。4 (、 、), , 3 。, , “”, 。 , 。, “”“”, 、, 、 , 。, , , , , 。, , 。, , “ ”, , , 。 :;;;;; :Q91　:A 　:1672-6561(2009)02-0111-24 Cambrian Explosion:Formation of Tree of Animals 1,2, 3 SH U De-gan (1.Early Lif e Institute, Northwest University, X i an 710069, Shaanxi, China;2.StateKey Laboratory of Continental Dynamics, Northwest University, Xi an 710069, Shaanxi, China;3.Schoolof the Earth Sciences and Resources, ChinaUniversity of eosciences, Beijing 100083, China) Abstract:The Kingdom Animalia is here divided into three subkingdoms:Diploblasta, Protostomia and Deuterostomia.Cambrian Explosion, including its first episode represented by the small skeletal fossils(SSFs)at the base of the Cambrian and the succeeding main episode represented by the Chengjiang faunas(CFs), together with its prelude represented by the Ediacaran faunas, have been recognized to give birth of the w hole 　:2009-03-25 　:;(2006C 806401); (PSRIRT); 　:(1946-), , , , ,。E-mail:elidg shu@ 112 　　　　　　　　　　　　　　　　　　31 morphological tree of animals (or metazoans), for short the TOA.Its “seed” in Precambrian, some sort of protists from which the complete TOA have grow n, remains unknown paleontologically.Ediacaran fauna was dominated by diploblasts (the “trunk” of the TOA )with a few possible stem-group triplobla