Parent taxon: Trepostomata according to A. Ernst and M. Carrera 2012
See also Ernst and Nakrem 2012, Koromyslova 2011, Nekhorosheva 2002, Pushkin and Popov 1999 and Sepkoski 2002
Sister taxa: Amalgamata, Esthonioporina, Esthonioporoidea, Glossotrypa, Integrata, Loxophragma, Polycylindricus, Ralfimartitidae, Trematoporidae
Subtaxa: Batostomellidae Dittoporidae Halloporidae Heterotrypidae Mesotrypidae Phragmoporidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Triassic of Iran (2 collections), Italy (8), Japan (3)
• Permian of Cambodia (1), China (4), Iran (1), Japan (3), Myanmar (1), Pakistan (4), the Russian Federation (1), the United Kingdom (4), United States (29: Alaska, California, Oklahoma, Texas, Wyoming)
• Carboniferous of Antarctica (1), Canada (1: Alberta), Spain (1), Svalbard and Jan Mayen (1), the United Kingdom (3), United States (16: Alaska, Arizona, Iowa, Kentucky, Oklahoma, Texas)
• Devonian of Argentina (1), Australia (1), Belarus (2), Belgium (1), China (3), Czechia (9), France (1), Germany (10), Iran (1), Mongolia (1), Morocco (5), New Zealand (4), Poland (1), the Russian Federation (1), Spain (14), Ukraine (2), United States (21: Iowa, Michigan, Missouri, New York, Ohio), Western Sahara (1)
• Niagaran of United States (1: New York)
• Silurian of Belarus (5), Canada (5: Northwest Territories, Ontario), China (2), India (2), Mongolia (4), Norway (2), the Russian Federation (4), Sweden (2), the United Kingdom (26), United States (24: Indiana, New York)
• Uhaku of the Russian Federation (1), Sweden (3)
• Dobrotivian of France (1)
• Chazyan of Canada (3: Northwest Territories), United States (5: Virginia)
• Billingen of the Russian Federation (9)
• Arenig of the Russian Federation (2), United States (1: Utah)
• Arenigian of United States (1: Maine)
• Ordovician of Argentina (4), Australia (1), Canada (42: British Columbia, Manitoba, Newfoundland, Northwest Territories, Nunavut, Ontario, Quebec), China (9), Czechia (1), Estonia (43), France (3), India (3), Italy (1), Latvia (1), Libya (1), Lithuania (1), Mongolia (2), Morocco (6), the Netherlands (1), Norway (36), the Russian Federation (30), South Korea (1), Spain (8), Sweden (13), the United Kingdom (7), United States (314: Alabama, California, Georgia, Illinois, Indiana, Iowa, Iowa, Wisconsin, Illinois, Kentucky, Maryland, Michigan, Minnesota, Minnesota, Iowa, Minnesota, Iowa, Wisconsin, Illinois, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Pennsylvania and Virginia, Tennessee, Virginia, Wisconsin, Wisconsin, Illinois, Iowa)
Total: 794 collections including 1448 occurrences