... echinoids, differ widely with respect to the above-mentioned features. Four genera were recognized: the clypeasteroids Clypeaster and Amphiope , the spatangoid Schizaster and the cassiduloid Conolampas . Although these taxa are in need of revision, a taxonomic analysis of these echinoids at species...

... ). These are currently placed into four families: the Echinolampadidae, comprising Echinolampas and Conolampas ; the Apatopygidae, comprising Apatopygus and Porteropygus ; the Cassidulidae, comprising Cassidulus, Rhyncholampas, Eurhodia, Oligopodia, and Studeria ; and the Neolampadidae, comprising Neolampas...