• 责任者：Liu Yunhuan (Faculty of Earth Sciences and Resources ; Chang’an University ; Xi’an 710054 ; China) ; Li Yong
• 刊名：Acta Palaeontologica Sinica
• 出版年：2013
• 卷期：52(4)
• 关键词：微体化石 ; microfossils ; 陕西 ; Shaanxi Province
• 页码：p.512-517
• 图表：3 illus., 27 refs.
• 分类号：1100
• issnNo：ISSN0001-6616
• isbnNo：CN32-1188/Q

     A new boita ＂Xixiang Boita＂ contain rich dif- ferential small shelly fossils including the various pyramid-shape Quadrapyrgites discovered in Kuanchuanpu Member in Xixiang County, Shaanxi Province. We can discern three types of cone from hundreds of Quadrapyrgites. A preliminary study about internal structure of Quadrapyrgites is per- formed here. The new material of the Quadra- pyrgites and other SSF in Xixiang Boita provides new evidence for examining the origin and the body plan of the metazoan during the early stage of the Cambrian Explosion.