Echinoidea - Cassiduloida

Alternative combinations: Cassidulus florealis, Clypeaster florealis

Belongs to Hardouinia according to C. W. Cooke 1953

See also Clark and Twitchell 1915

Sister taxa: Hardouinia aequorea, Hardouinia bassleri, Hardouinia conoideus, Hardouinia kellumi, Hardouinia mcglameryae, Hardouinia micrococcus, Hardouinia mortonis, Hardouinia stantoni, Hardouinia taylori, Clarkiella hemispherica

Type specimen: Its type locality is Chesapeake and Delaware Canal (Marshalltown, ANSP), which is in a Campanian marine sandstone in the Marshalltown Formation of Delaware

Distribution: found only at Chesapeake and Delaware Canal (Marshalltown, ANSP)

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Specimen images are retrieved through the ePANDDA API.