Rhynchonellata - Orthida - Platyorthidae
Parent taxon: Dalmanelloidea according to A. Williams et al. 2000
See also Boucot et al. 2008
Sister taxa: Angusticardiniidae, Dalmanellidae, Dicoelosiidae, Harknessellidae, Heterorthidae, Hypsomoniidae, Kayserellidae, Mystrophoridae, Paurorthidae, Portranellidae, Proschizophoriidae, Rhipidomellidae, Tyronellidae
Subtaxa: Crozonorthis Diceromyonia Eorhipidomella Marklandella Platyorthis Proclinorthis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Algeria (1 collection), Australia (1), Brazil (3), Canada (1: Nova Scotia), France (4), Germany (6), Luxembourg (2), Morocco (2), Poland (1), Spain (12), Ukraine (4), the United Kingdom (4), United States (12: New York), Venezuela (1), Vietnam (2)
• Silurian to Devonian of Spain (1)
• Silurian of Estonia (1), Mongolia (1), Norway (4), United States (3: Missouri)
• Ordovician of Canada (31: Manitoba, Northwest Territories), France (2), Portugal (3), the Russian Federation (1), Spain (12), United States (25: Idaho, Illinois, Iowa, Iowa, Minnesota, Nevada, Oklahoma, Tennessee, Texas, Wyoming)
Total: 140 collections including 142 occurrences