500–0 Ma 的软甲纲显示采用经综述的叶虾类化石最低界，不得解释为软甲纲冠群分化日期。
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参考文献 / paperEarly Evolution of Phyllocarid Arthropods: Phylogeny and Systematics of Cambrian-Devonian Archaeostracans
Collette, J.H.; Hagadorn, J.W.
年份2010
来源角色primary-study
DOI / ID10.1666/09-092.1
适用范围
taxonomy · range · 拓扑
Phylogenetic and systematic treatment supporting a middle–late Cambrian phyllocarid record.