Superfamily Cytheroidea Baird, 1850

Family Cytheridae Baird, 1850

Genus Cythere O. F. Müller, 1785

Cythere sp.

Family Xestoleberidae Sars, 1928

Genus Xestoleberis Sars, 1866

Xestoleberis hanaii Ishizaki, 1968

Xestoleberis sagamiensis Kajiyama, 1913

Xestoleberis sp.

Family Hemicytheridae Puri, 1953

Genus Aurila Pokorny, 1955

Aurila inabai Okubo, 1976

Genus Robustoaurila Yajima, 1982

Robustaurila ishizakii (Okubo, 1980)

Genus Callistocythere Ruggieri, 1953

Callistocythere minor Hanai, 1957

Callistocythere setouchiensis Okubo, 1979

Family Paradoxostomatidae Brady and Norman, 1889

Genus Paradoxostoma Fischer, 1855

Paradoxostoma ovulare Kajiyama, 1913

Paradoxostoma flaccidum Schornikov, 1975

Paradoxostoma yatsui Kajiyama, 1913

Paradoxostoma lunatum Okubo, 1977

Genus Cytherois Müller, 1884

Cytherois sp.

Family Cytheromatidae Elofson, 1939

Genus Microloxoconcha Hartmann, 1954

Microloxoconcha sp.

Family Bythocytheridae Sars, 1866

Genus Sclerochilus Sars, 1866

Sclerochilus sp.

Sclerochilus sp.