Rhynchonellata - Orthida - Heterorthidae
Parent taxon: Dalmanelloidea according to L. Hints and D. A. T. Harper 2015
See also Williams et al. 2000
Sister taxa: Angusticardiniidae, Dalmanellidae, Dicoelosiidae, Harknessellidae, Hypsomoniidae, Kayserellidae, Mystrophoridae, Paurorthidae, Platyorthidae, Portranellidae, Proschizophoriidae, Rhipidomellidae, Tyronellidae
Subtaxa: Arenorthis Cacemia Cilinella Fehamya Heterorthella Heterorthina Heterorthis Incorthis Marionites Svobodaina Tafilaltia Tarfaya Tissintia
Type: Heterorthis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Silurian of Argentina (7 collections), Brazil (1), Canada (2: Quebec), Guinea (1), Peru (3)
• Dobrotivian of Czechia (1), France (6), Morocco (2), Portugal (11), Spain (18)
• Liben of Czechia (3)
• Letna of Czechia (1)
• Arenig of Argentina (4), Bolivia (1), Morocco (1)
• Ordovician to Silurian of South Africa (1)
• Ordovician of Argentina (4), Australia (1), Austria (1), Bolivia (6), Canada (4: Ontario, Quebec), China (1), Czechia (6), France (4), Iran (17), Latvia (1), Morocco (13), Paraguay (4), Peru (2), Portugal (3), Spain (22), Sweden (2), Türkiye (1), the United Kingdom (62), United States (40: California, Illinois, Iowa, Kentucky, Michigan, Minnesota, Ohio, Tennessee), Venezuela (1)
Total: 258 collections including 291 occurrences