Edrioasteroidea - Isorophida

Parent taxon: Isorophida according to C. D. Sumrall and F.J. Gahn 2006

Sister taxa: Archaepyrgus, Argodiscus, Belochthus, Bostryclavus, Chatsworthia, Clavidiscus, Cryptogoleus, Curvitriordo, Deltadiscus, Edriodiscus, Epipaston, Euhydrodiskos, Fanulodiscus, Floridiscus, Giganticlavus, Hadrochthus, Hadrodiscus, Hypsiclavus, Hystrichopsydrax, Krama, Rectitriordo, Savagella, Spiraclavus, Stalticodiscus

Subtaxa: Agelacrinites, Cooperidiscus, Discocystinae, Discocystis, Isorophus, Isorophusella, Lepidodiscus, Neoisorophusella, Postibulla, Postibullinae, Thresherodiscus, Ulrichidiscus

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Ecology: stationary low-level epifaunal suspension feeder