The Echinoid Directory

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Porosoma cribrum (Agassiz, in Agassiz & Desor, 1846); University of Lyon, Ecole de Mines collection, uncatalogued. Eocene, Castel Gomberto, Italy. Specimen illustrated by Desor, E.  1858, Synopsis des Echinides fossiles. Reinwald, Paris. pl. 15, figs 8-10). Apical view.

Diameter of test 36 mm.