Douvillé, 1922 Discocyclinidae Eocene unknown type specimen holotype 1 / FEU-1019906 | Douvillé, 1922 Discocyclinidae Eocene unknown type specimen holotype 2 / FEU-1019907 | (Costa, 1856) Discocyclinidae unknown type specimen holotype 3 / FEU-1022184 | (Rao, 1942) Discocyclinidae 4 / FEU-1023697 |