Abstract Hurdiidae, a clade of Radiodonta that has attracted widespread attention in recent years, is notable for their massive tripartite cephalic carapace and a wide variety of feeding habits. Although the Hurdiidae has a cosmopolitan distribution in the Cambrian, their Miaolingian occurrences are restricted to Laurentia. Here we describe a new hurdiid radiodont, Cordaticaris striatus gen. et sp. nov., based on well-preserved specimens from the middle Cambrian (Miaolingian, Drumian) Zhangxia Formation in Shandong Province, North China. This new taxon is characterized by a heart-shaped central element with linear ornament, frontal appendages equipped with nine blade-like endites including seven subequal elongate endites, a node-bearing ‘peytoia’-type oral cone, and a trunk covered with rows of setal structures. Cordaticaris not only enriches the taxonomic diversity of Hurdiidae, but also further documents the great morphological disparity of hurdiid sclerotized body elements. The discovery of soft-bodied fossils in the Zhangxia Formation also stresses the great potential of the Miaolingian strata of North China for the preservation of non-biomineralized organisms.

中文翻译：

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华北中寒武纪新放射齿兽：对流星雨形态差异和空间分布的启示

摘要 Hurdiidae 是近年来受到广泛关注的放射齿科的一个分支，以其巨大的三方头甲壳和多种多样的摄食习性而著称。虽然蜂鸟科在寒武纪有世界性的分布，但它们的妙龄期只出现在劳伦纪。在这里，我们描述了一种新的 hurdiid radiodont，Cordaticaris striatus gen。等 sp. 11 月，基于华北山东省中寒武统（苗陵阶、德鲁系）张夏组保存完好的标本。这个新分类群的特征是一个带有线性装饰的心形中心元素，配备有九个叶片状尾端的前附肢，其中包括七个等长的细长尾端，一个带有节点的“peytoia”型口腔锥体，以及一个覆盖着成排固定结构。Cordaticaris 不仅丰富了葫芦科的分类多样性，而且进一步证明了葫芦科硬化体元素的巨大形态差异。张夏组软体化石的发现，也凸显了华北苗岭阶地层在非生物矿化生物保存方面的巨大潜力。