ABSTRACT

Rare phosphatised fragments within small shelly fossil assemblages from the upper Henson Gletscher Formation (Cambrian, Miaolingian Series, Wuliuan Stage) of North Greenland (Laurentia) are described as Dietericambria hensoniensis n. gen. n. sp. Two pairs of minute cephalic limbs promote comparison with stem-group pentastomids, best known from the late Cambrian (Furongian) Orsten Lagerstätten of Sweden. The North Greenland occurrence is interpreted as the oldest yet described tongue worm and extends the record of pentastomids by about 15 m.y. Dietericambria hensoniensis preserves a unique median axial complex of uncertain function, probably an attachment organ; a mouth has not been identified. Isolated hooks and spicules in the samples from the Henson Gletscher Formation are compared to the grasping hooks and copulatory spicules of the extant pentastomid Raillietiella, although their interpretation is speculative.

摘要

北格陵兰 (Laurentia) 上 Henson Gletscher 组 (寒武纪，苗岭系列，五六期) 的小壳化石组合中的稀有磷化碎片被描述为Dietericambria hensoniensis n。将军 n. sp。两对微小的头肢促进了与干组五口动物的比较，后者以瑞典的晚寒武纪（芙蓉纪）Orsten Lagerstätten 最为人所知。北格陵兰的发生被解释为最古老的舌虫，并将五口虫的记录延长了大约 15 my Dietericambria hensoniensis保留了一个独特的功能不确定的中轴复合体，可能是一个附着器官；尚未确定嘴巴。将 Henson Gletscher 组样品中孤立的钩子和骨针与现存五口动物Raillietiella的抓钩和交配骨针进行了比较，尽管它们的解释是推测性的。