Invalid names: Asterosmilia sakalavensis Alloiteau 1951 [synonym], Notocyathus morozi Kuzmicheva 1975 [synonym], Paracyathus kangpaensis Wu 1975 [synonym], Protrochocyathus septempartitus Alloiteau 1958 [synonym], Trochocyathus corbicula Duncan 1880 [synonym], Trochocyathus dakotaensis Vaughan 1920 [synonym], Trochocyathus haunsbergensis Traub 1938 [synonym], Trochocyathus matleyi Wells 1934 [synonym], Trochocyathus neumani Vaughan 1920 [synonym]