Cucumariidae Ludwig, 1894
Duasmodactyla seguroensis (Deichmann, 1930)
Thyonidium cebuense Semper, 1868
Thyonidium cylindricum
Thyonidium diomedaea (Oishima, 1915)
Thyonidium diomedeae (Ohshima, 1915)
Thyonidium drummondii (Thompson, 1840)
Thyonidium flavum Greef, 1882
Thyonidium glabra Ayres, 1851
Thyonidium hyalinum (Forbes, 1841)
Thyonidium kurilensis (Levin, 1984)
Thyonidium lapidifera (Lesueur, 1824)
Thyonidium musculosa Ayres, 1851
Thyonidium productum (Ayres, 1852)
Thyonidium seguroensis (Deichmann, 1930)
Thyonidium tabulata (Ohshima, 1915)
Thyonidium turriculacava (Massin, 1987)
