†family Triadocidaridae Smith 1994 (sea urchin)
PaleoDB taxon number: 267704
Full reference: A. B. Smith. 1994. Triassic echinoids from Peru. Palaeontographica Abteilung A 233:177-202
Parent taxon: Euechinoidea according to A. B. Smith 1994
Sister taxa: Acroechinoidea, Diadematacea, Echinacea, Echinothurioida, Galeroclypeus, Loriolella, Serpianotiaroida, Triadotiaroida
Subtaxa: Levicidaris, Megaporocidaris, Mikrocidaris, Parvicidaris, Triadocidaris, Vinchuscanchaia, Zardinechinus
Type: Triadocidaris
Ecology: epifaunal grazer-deposit feeder