Differs from Levicidaris in having much higher ambulacral plates with smaller tubercles and more circular pore-pairs. The mamelons in Levicidaris increase in size adapically, but are largest at the ambitus and decrease adapically in Megaporocidaris.
Kier, P.M. 1977. Triassic echinoids. Smithsonian Contributions to Paleobiology 30, 1-88.
Kier, P. M. 1984. Echinoids from the Triassic (St Cassian) of Italy, their lantern supports, and a revised phylogeny of Triassic echinoids. Smithsonian Contributions to Paleobiology 56, 1-41.