†Palaeodiscus Salter 1857 (sea urchin)
Echinoidea - Perischoechinoidea - Lepidocentridae
Parent taxon: Lepidocentridae according to P. M. Kier 1966
Sister taxa: Albertechinus, Aulechinus, Deneechinus, Ectinechinus, Elliptechinus, Eothuria, Hyattechinus, Kongielechinus, Koninckocidaris, Lepidechinoides, Lepidechinus, Lepidocentrus, Myriastiches, Perischodomus, Pholidechinus, Pholidocidaris, Porechinus
Subtaxa: none
Ecology: slow-moving low-level epifaunal grazer