Apiocrinidae (basis of record)
Cystignathidae (basis of record)
Eupoliidae accepted as Baseodiscidae (basis of record)
Homotremidae accepted as Homotrematidae Cushman, 1927 (basis of record)
Iulidae accepted as Julidae Leach, 1814 (basis of record)
Lycosuchidae Haughton & Brink, 1954 † (basis of record)
Melonitidae † accepted as Palaechinidae McCoy, 1849 † (basis of record)
Muriceidae accepted as Plexauridae Gray, 1859 (basis of record)
Neogoveidae Shear, 1980 (basis of record)
Nitosauridae † (basis of record)
Pteropidae Gray, 1821 accepted as Pteropodidae Gray, 1821 (basis of record)
Pulemidae (basis of record)
Solmaridae (basis of record)
Tiaridae Haeckel, 1879 accepted as Pandeidae Haeckel, 1879 (basis of record)
Triisiodontidae † (basis of record)