Adriana de Gregorio, 1934 † (original description)
Anellidia Gregorio, 1930 † (original description)
Concretum Gregorio, 1930 † (original description)
Corobalanus Gregorio, 1930 † (original description)
Digitia De Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † (original description)
Girlasia de Gregorio, 1930 † (original description)
Imperia de Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † (original description)
Irma de Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † (original description)
Larites de Gregorio, 1930 † (original description)
Larium de Gregorio, 1930 † (original description)
Lespius de Gregorio, 1930 † (original description)
Mammosum De Gregorio, 1930 † accepted as Streptorynchus King, 1850 † (original description)
Pirgula De Gregorio, 1930 † accepted as Pirgulia Cooper & Muir-Wood, 1951 † (original description)
Prisca De Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † (original description)
Rimpia Gregorio, 1930 † (original description)
Socraticum de Gregorio, 1930 † (original description)
Spirisosium de Gregorio, 1930 † (original description)
Stita De Gregorio, 1930 † accepted as Adriana de Gregorio, 1934 † (original description)
Turriculum Gregorio, 1930 † accepted as Geyerella Schellwien, 1900 † (original description)
Vincia De Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † (original description)
Virbium De Gregorio, 1930 † (original description)