Full reference: S. Bengtson, S. Conway Morris, B. J. Cooper, P. A. Jell, and B. N. Runnegar. 1990. Early Cambrian fossils from South Australia. Association of Australasian Palaeontologists 9:1-364
Parent taxon: Hyolithida according to J. J. Sepkoski 2002
Sister taxa: Aimitus, Altaicornus, Amydaicornus, Anabaricornus, Angusticornidae, Angusticornus, Atdabanithes, Australothecidae, Borealicornus, Brevilabiatus, Cavernolites, Crestjahitidae, Decipilites, Doescherina, Elegantilites, Emarites, Erraticornus, Firmicornus, Galicornus, Gompholites, Goniocornus, Grantitheca, Haplophrentis, Hyolithes, Hyolithidae, Hyolithina, Hyptiotheca, Ingolitotheca, Insignicornus, Insolitotheca, Jacuticornus, Jacutolitus, Joachimilites, Ketemecornus, Kuonamkicornus, Laticornus, Lenalitus, Lirotheca, Matthevina, Meitanovitus, Nelegerocornidae, Neopauxillites, Nitoricornus, Notabilitus, Oblisicornus, Oboedalites, Oxytus, Paracornus, Parakolithes, Parakorilithes, Patholites, Pauxillites, Pauxillitidae, Planotheca, Rarissimetus, Rodentilites, Similothecidae, Slapylites, Tajinella, Tizilites, Tulenicornus, Virgatotheca, Virgulaxonaria, Yacutolithuus, Yankongovitus
Subtaxa: Parkula bounites, Parkula esmeraldina
Type: Parkula bounites
Ecology: facultatively mobile epifaunal suspension feeder