Isorophus is an extinct genus of Echinoderm belonging to the class Edrioasteroidea. It is commonly found in deposits dating to the Ordovician period....

Foerstediscus Giganticlavus Hadrochthus Hemicystites Hypsiclavus Hystrichopsydrax Isorophus Isorophusella Krama Lampteroblastus Lebetodiscus Lepidoconia Lepidodiscus...

researchers found Yorkicystis to form a larger clade with edrioasteroids Isorophus, Argodiscus, and Kailidiscus. Due to its unique appearance and age, Yorkicystis...

vorticellatus Cryptogoleus C. chapmani Carneyella C. pilea C. faberi C. ulrichi Isorophus I. cincinnatiensis Isorophusella Camptostroma **C. roddyi Rectitriordo...

†Agelacrinites †Cooperidiscus †Discocystinae †Discocystis †Hystrichopsydrax †Isorophus †Isorophusella †Lepidodiscus †Neoisorophusella †Postibulla †Postibullinae...

†Isochilina †Isochilina ampla – or unidentified comparable form †Isorophus †Isorophus cincinnatiensis †Isorthoceras †Isorthoceras albersi – type locality...

locality for species †Isonema †Isonema depressum †Isorophus †Isorophus austini †Isorophus holbrooki †Isorophus warrenensis †Isorthoceras †Isorthoceras albersi...

†Isocatillocrinus †Isocrinus †Isomicraster †Isopetalum †Isopneustes †Isorophus †Isorophusella †Isotomocrinus †Isselicrinus †Iteacrinus †Ivanovaecrinus...

lasallensis – type locality for species †Isodectes †Isodectes obtusus †Isorophus – tentative report †Isorthis †Isotelus †Isotelus gigas †Isotelus maximus...