†Hardyia Walcott 1924 (trilobite)
Parent taxon: Missisquoiidae according to P. A. Jell and J. M. Adrain 2003
Sister taxa: Lunacrania, Missisquoia, Parakoldinioidia, Pseudokoldinioidia, Tangshanaspis, Tasmanocephalus
Subtaxa: none
Ecology: fast-moving low-level epifaunal carnivore