三叶虫是寒武纪演化动物群中最引人注目的成员之一, 其内部解剖结构一直以来受到广泛关注。与其他非生物矿化软体结构相比, 三叶虫的消化系统更容易留下化石记录, 为探索其内部结构提供了难得的机会。本文描述了来自山东省潍坊市寒武系馒头组的Proasaphiscus, Lioparia, Deiradonyx和Iranoleesia, 以及临沂市寒武系张夏组的Maotunia共五个三叶虫属的消化系统。这些保存较好的标本展示了三叶虫的四对头部消化腺, 以及可能的头部消化腺与“嗉囊”共存的例子, 为了解三叶虫消化系统尤其是头部消化系统的结构提供了新的信息。三叶虫非生物矿化软体结构的保存也显示了这些层位有发现布尔吉斯页岩型特异埋藏化石的潜力。

The preservation of trilobite digestive structures provides a rare opportunity to explore its internal anatomy. Here we report the digestive structures of five trilobite genera from Shandong Province, North China. The trilobite genera include Proasaphiscus, Lioparia, Deiradonyx, Iranoleesia from the Cambrian Miaolingian Mantou Formation in Weifang area, and Maotunia from the Cambrian Miaolingian Zhangxia Formation in Linyi area. The well-preserved specimens displayed exam-ples of four pairs of cephalic digestive glands, and a digestive system consisting of both paired digestive glands and a crop. Our discovery provides new information for understanding the pattern of the trilobite digestive structures, especially in the cephalon.