†order Harpetida Ebach and McNamara 2002 (trilobite)
Full reference: M. C. Ebach and K. J. McNamara. 2002. A systematic revision of the family Harpetidae (Trilobita). Records of the Western Australian Museum 21:135-167
Parent taxon: Librostoma according to M. C. Ebach and K. J. McNamara 2002
Sister taxa: none
Subtaxa: Entomaspididae, Harpetidae, Harpididae
Ecology: fast-moving low-level epifaunal carnivore