Parent taxon: Hyolithida according to D. W. Fisher 1962
Sister taxa: Aimitus, Aladracina, Altaicornus, Amydaicornus, Anabaricornus, Angusticornidae, Angusticornus, Atdabanithidae, Australothecidae, Bolithes, Borealicornus, Brevilabiatus, Carinolithidae, Cavernolites, Crestjahitidae, Decipilites, Doescherina, Emarites, Erraticornus, Firmicornus, Galicornus, Glossolites, Gompholites, Goniocornus, Grantitheca, Hyolithidae, Hyptiotheca, Ingolitotheca, Insignicornus, Insolitotheca, Jacuticornus, Jacutolitus, Jincelites, Joachimilites, Ketemecornus, Kuonamkicornus, Lathamoserpens, Laticornus, Lenalitus, Lirotheca, Matthevina, Maxilites, Meitanovitus, Nelegerocornidae, Nitoricornus, Notabilitus, Oblisicornus, Oxytus, Paracornus, Parakolithes, Parakorilithes, Parentilitidae, Parkula, Patholites, Pauxillites, Pauxillitidae, Rarissimetus, Rodentilites, Similothecidae, Slapylitidae, Tajinella, Tizilites, Tulenicornus, Virgatotheca, Yacutolithuus
Subtaxa: Ceratothecidae Pterygothecidae Sulcavitidae
Ecology: facultatively mobile epifaunal suspension feeder
Distribution:
• Devonian of the Czech Republic (1 collection)
• Silurian of the Czech Republic (2)
• Ordovician of Sweden (1)
• Cambrian of Australia (5), China (39), Germany (3), Kazakhstan (5), Kyrgyzstan (3), Mongolia (2), Poland (1), the Russian Federation (23)
• Delamaran of Canada (3: Alberta, British Columbia), United States (1: Utah)
• Waucoban of Greenland (1)
Total: 90 collections including 123 occurrences