Edrioasteroidea - Hemicystitidae
Parent taxon: Edrioasteroidea according to G. Regnéll 1945
See also Regnéll 1966
Sister taxa: Aragocystites, Camptostroma, Cyathocystida, Cyathothecidae, Edrioasterida, Edrioblastoida, Isorophida, Isorophina, Isorophinidae, Kailidiscus, Pyrgocystidae, Stromatocystitida, Stromatocystitidae, Yorkicystitidae
Subtaxa: Anglidiscus Bassleridiscus Carneyella Cincinnatidiscus Cystaster Foerstediscus Hemicystites Lebetodiscus Lepidoconia Timeischytes
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Devonian of Germany (1 collection), United States (1: Iowa)
• Silurian of Canada (1: Ontario), United States (2: New York)
• Letna of the Czech Republic (1)
• Arenig of Morocco (1)
• Ordovician of Canada (4: Ontario, Quebec), the Czech Republic (1), Morocco (1), United States (25: Illinois, Iowa, Indiana, Iowa, Iowa, Illinois, Minnesota, New York, Ohio, Oklahoma)
Total: 38 collections including 50 occurrences