INTRODUCTION:THE CAMBRIAN RADIATION OF METAZOANS—NEW ADVANCES AND FOSSIL DISCOVERIES FROM CHINA
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Abstract:
Cambrian Explosion represents an astonishing burst of evolutionary innovation with the first 30 million years of the Cambrian witnessing the appearance of most bilaterian animal body plans,many of which still exist today.Alongside crown group phyla there are other bizarre stem group Cambrian forms which made sudden appearance,but soon became extinct.New data from a range of exceptionally preserved Cambrian K?nversat-Lagerst?tte of China provide crucial data to unravel the evolutionary and revolutionary scope of this milestone biological event.The fossils discussed in the Special Issue(SI)of Acta Palaeoontologica Sinica mainly come from the Cambrian Terreneuvian Fortunian Kuanchuanpu Biota of southern Shaanxi Province; the pre-trilobite Yanjiahe Biota(Terreneuvian,Stage 2)and the Cambrian first-trilobite age Shuijingtuo Formation(upper Stage 3-lower Stage 4)and the Shipai Biota(Stage 4)in the Three-Gorges area of Yichang,western Hubei Province;the Chengjiang(Stage 3)and Guanshan(Stage 4)biotas in the eastern Yunnan Province;and the Jialao Formation(Series 3,Stage 5)of Guizhou Province.
