Radiodonts are a diverse clade of Lower Palaeozoic stem-group euarthropods that played a key role in the emergence of complex marine trophic webs. The latest addition to the group, Cambroraster falcatus, was recently described from the Wuliuan Burgess Shale, and is characterized by a unique horseshoe-shaped central carapace element. Here we report the discovery of Cambroraster sp. nov. A, a new species from the Cambrian Stage 3 Chengjiang Lagerstätte of South China. The new occurrence of Cambroraster demonstrates that some of the earliest known radiodonts had already evolved a highly derived carapace morphology adapted to an essentially eudemersal life as sediment foragers.

中文翻译：

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早寒武世澄江Lagerstätte eudenersal radiodont Cambroraster 的发生与水体生态型的多样性

Radiodonts 是下古生代茎组真节肢动物的多样化分支，在复杂的海洋营养网的出现中发挥了关键作用。该组的最新成员，镰刀鱼，最近从五六安伯吉斯页岩中被描述，其特点是独特的马蹄形中央甲壳元素。在这里，我们报告发现摄影机sp。十一月 A，华南寒武纪澄江三期新种。新出现的摄影机证明了一些已知最早的放射齿兽已经进化出一种高度衍生的甲壳形态，以适应作为沉积物觅食者的基本生命。