Rhynchonellata - Orthida - Platystrophiidae
Parent taxon: Plectorthoidea according to M. Liljeroth et al. 2017
See also Benedetto 2003, Rubel 2011, Williams et al. 2000, Zuykov and Egerquist 2005 and Zuykov and Harper 2007
Sister taxa: Apatoskenidioides, Chilcorthidae, Cremnorthidae, Cyclocoeliidae, Eoorthidae, Euorthisinidae, Finkelnburgiidae, Giraldiellidae, Lebediorthis, Nanorthidae, Phragmorthidae, Plectorthidae, Ranorthidae, Rhactorthidae, Tasmanorthidae, Wangyuiidae
Subtaxa: Acanthorthis Ffynnonia Gnamptorhynchos Mcewanella Neoplatystrophia Platystrophia Salacorthis Siljanostrophia Vinlandostrophia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Jaani of Estonia (1 collection)
• Silurian of Belarus (1), Canada (10: British Columbia, Manitoba, Ontario, Quebec), Estonia (8), Jordan (1), Sweden (7), the United Kingdom (2), United States (56: Georgia, Illinois, Indiana, Iowa, Nevada, New York, Wisconsin)
• Uhaku of Belarus (1), Latvia (1), Lithuania (1)
• Whiterockian of United States (1: Nevada)
• Volkhov of Estonia (2), Lithuania (1), the Russian Federation (13)
• Valaste of Estonia (2)
• Hunderum of the Russian Federation (2)
• Arenigian of Argentina (1), United States (1: Maine)
• Arenig of Argentina (2), the United Kingdom (1)
• Ordovician to Silurian of Canada (1: New Brunswick)
• Ordovician of Argentina (2), Belarus (8), Belgium (9), Canada (82: British Columbia, Manitoba, Newfoundland, Northwest Territories, Nunavut, Ontario, Quebec, Québec, Yukon), China (4), Estonia (87), France (1), Ireland (6), Latvia (7), Lithuania (32), the Netherlands (2), Norway (18), Portugal (1), the Russian Federation (21), Spain (2), Sweden (11), the United Kingdom (49), United States (761: California, Georgia, Idaho, Illinois, Iowa, Indiana, Iowa, Kentucky, Maine, Michigan, Minnesota, Nevada, New Mexico, New York, Ohio, Oklahoma, Tennessee, Texas, Virginia, Wyoming), Venezuela (1)
Total: 1220 collections including 1588 occurrences