†order Isorophida

Edrioasteroidea - Isorophida

Parent taxon: Edrioasteroidea according to C. D. Sumrall and S. Zamora 2011

See also Sepkoski 2002

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

Subtaxa: Agelacrinitidae Bostryclavus Chatsworthia Clavidiscus Cryptogoleus Curvitriordo Deltadiscus Floridiscus Giganticlavus Hadrochthus Hadrodiscus Hypsiclavus Krama Lebetodiscidae Protorophus Rectitriordo Spiraclavus Stalticodiscus

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Ecology: stationary low-level epifaunal suspension feeder

Distribution:

• Permian of the Russian Federation (1 collection)

• Osagean of United States (1: Illinois)

• Carboniferous of Canada (2: Alberta), United States (6: Alabama, Arizona, Oklahoma)

• Devonian of Germany (1), United States (4: Iowa, New York, Ohio)

• Ordovician of Canada (5: Ontario), United States (6: Illinois, Illinois, Iowa, Minnesota)

• Cambrian of Australia (1), Spain (2)

Total: 29 collections including 36 occurrences

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