Cricocosmiidae Hou, Bergström, Wang, Feng, and Chen, 1999

Han, Jian, Liu, Jianni, Zhang, Zhifei, Zhang, Xingliang & Shu, Degan, 2007, Trunk ornament on the palaeoscolecid worms Cricocosmia and Tabelliscolex from the Early Cambrian Chengjiang deposits of China, Acta Palaeontologica Polonica 52 (2), pp. 423-431 : 425

Family Cricocosmiidae Hou, Bergström, Wang, Feng, and Chen, 1999

Diagnosis.—Elongate trunk with paired macrosclerites on each annulus that is wide and less prominent on the dorsal side. Macrosclerites composed of many tubercles on the outer surface and corresponding pits in the inner surface. Tubercles with or without inner circlet. Terminal trunk with a pair of hooks.

Remarks.— Houscolex Zhang and Pratt, 1996 , Cricocosmia and Tabelliscolex should be assigned to this family.