†family Dittoporidae Vinassa de Regny 1920 (bryozoan)
Stenolaemata - Trepostomata - Dittoporidae
Parent taxon: Halloporina according to V. I. Pushkin and L. E. Popov 1999
Sister taxa: Batostomellidae, Halloporidae, Heterotrypidae, Mesotrypidae, Phragmoporidae
Subtaxa: Hemiphragma
Ecology: stationary epifaunal suspension feeder
Distribution:
• Uhaku of Sweden (1 collection)
• Chazyan of United States (2: Virginia)
• Billingen of the Russian Federation (8)
• Ordovician of Canada (5: Ontario, Quebec), Estonia (9), France (2), Norway (1), the Russian Federation (4), Sweden (2), United States (31: Iowa, Kentucky, Minnesota, Minnesota, Iowa, Minnesota, Iowa, Wisconsin, Illinois, Ohio, Oklahoma, Tennessee, Virginia)
Total: 65 collections including 73 occurrences