†Megacidaris (pencil urchin)
Echinoidea - Cidaroida - Cidaridae
PaleoDB taxon number: 32805
Parent taxon: Rhabdocidarinae according to H. B. Fell 1966
Sister taxa: Chondrocidaris, Parhabdocidaris, Plococidaris, Porocidaris
Subtaxa: none
Ecology: slow-moving low-level epifaunal grazer-omnivore