Isorophus

{{Short description|Extinct genus of echinoderms}}

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| taxon = Isorophus

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Isorophus is an extinct genus of Echinoderm belonging to the class Edrioasteroidea. It is commonly found in deposits dating to the Ordovician period. There are several species, with one (Isorophus cincinnatiensis) being the official fossil of the city of Cincinnati in the US state of Ohio.{{cite web |title=The Official City of Cincinnati Fossil |url=https://www.cincymuseum.org/2021/03/09/the-official-city-of-cincinnati-fossil/ |website=cincymuseum.org|date=9 March 2021 }}