Hyolitha - Hyolithida - Hyolithidae
Parent taxon: Hyolithida according to J. M. Malinky 1990
See also Benson et al. 1961, Henningsmoen 1952 and Kruse 2002
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, Hyolithina, 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: Elegantilites Hallotheca Haplophrentis Helenia Hyolithes Korilithes Nevadotheca Novakotheca Sololites Yalarrnga
Type: Hyolithes
Ecology: facultatively mobile epifaunal suspension feeder
Distribution:
• Permian of Australia (1 collection), Madagascar (1)
• Carboniferous of Argentina (4), Australia (2), United States (4: California, Indiana, Virginia)
• Devonian of Australia (7), Brazil (8), Canada (1: Quebec), Ghana (1), Morocco (1), South Africa (6), Spain (1), United States (18: Illinois, New York, Pennsylvania)
• Silurian of Australia (5), Canada (2: Nova Scotia), Paraguay (1), Poland (1), the United Kingdom (19), United States (2: Ohio, Tennessee)
• Dobrotivian of the Czech Republic (1), France (1), Morocco (1), Portugal (2), Spain (2)
• Whiterockian of United States (1: Nevada)
• Arenig of Canada (1: Yukon)
• Klabava of the Czech Republic (1)
• Ordovician of Canada (2: Nunavut, Ontario), China (1), the Czech Republic (7), Morocco (7), Spain (1), Sweden (14), the United Kingdom (12), United States (7: Iowa, Kentucky, Missouri, Ohio, Pennsylvania)
• Tremadoc of Argentina (2), the United Kingdom (1), United States (1: New York)
• Cressagian of the United Kingdom (2)
• Amgan of the Czech Republic (2), Norway (1)
• Solvan of Argentina (1), Canada (2: British Columbia), Sweden (3)
• Delamaran of Canada (25: British Columbia), Mexico (1), United States (8: California, Idaho, Utah, Vermont)
• Ordian of Australia (1)
• Caerfai of Canada (2: Northwest Territories, Nunavut), United States (1: New York)
• Cambrian of Antarctica (1), Argentina (2), Australia (52), Canada (33: British Columbia, Labrador, New Brunswick, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Quebec), China (5), the Czech Republic (1), Denmark (1), Germany (1), Greenland (1), India (1), Mexico (4), Norway (4), the Russian Federation (4), Svalbard and Jan Mayen (1), Sweden (5), the United Kingdom (6), United States (62: Arizona, California, Idaho, Idaho/ Utah, Indiana, Maryland, Massachusetts, Montana, Nevada, New York, Pennsylvania, South Dakota, Utah, Vermont, Wisconsin, Wyoming, Wyoming-Montana)
Total: 383 collections including 442 occurrences