ammonites
Perischodomus M'Coy 1849 (sea urchin)

Echinoidea - Perischoechinoidea - Lepidocentridae

Full reference: F. M'Coy. 1849. On some new Paleozoic Echinodermata. Annals and Magazine of Natural History, ser. 2 3:244-254

Parent taxon: Lepidocentridae according to P. M. Kier 1966

Sister taxa: Albertechinus, Aulechinus, Deneechinus, Ectinechinus, Elliptechinus, Eothuria, Hyattechinus, Kongielechinus, Koninckocidaris, Lepidechinoides, Lepidechinus, Lepidocentrus, Myriastiches, Palaeodiscus, Pholidechinus, Pholidocidaris, Porechinus

Subtaxa: none

Ecology: slow-moving low-level epifaunal grazer