†family Hemicystitidae Bassler 1936

Edrioasteroidea - Hemicystitidae

Parent taxon: Edrioasteroidea according to G. Regnéll 1945

See also Regnéll 1966

Sister taxa: Aragocystites, Cyathocystida, Cyathothecidae, Edrioasterida, Edrioblastoida, Isorophida, Isorophina, Isorophinidae, Kailidiscus, Pyrgocystidae, Stromatocystitida, Stromatocystitidae

Subtaxa: Anglidiscus Bassleridiscus Carneyella Cincinnatidiscus Cystaster Foerstediscus Hemicystites Lebetodiscus Lepidoconia Timeischytes

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Ecology: stationary low-level epifaunal suspension feeder


• Devonian of United States (1: Iowa collection)

• Silurian of Canada (1: Ontario), United States (2: New York)

• Ordovician of Canada (4: Ontario, Quebec), the Czech Republic (4), Morocco (1), United States (25: Illinois, Iowa, Indiana, Iowa, Iowa, Illinois, Minnesota, New York, Ohio, Oklahoma)

• Arenig of Morocco (1)

Total: 39 collections including 50 occurrences

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