Anisoporus Ozaki, 1928 (original description)
Anisoporus cobraeformis Ozaki, 1928 (original description)
Diploporus Ozaki, 1928 accepted as Bianium Stunkard, 1930 (original description)
Diploporus cryptostoma Ozaki, 1928 accepted as Diploproctodaeum cryptostoma (Ozaki, 1928) Sogandares-Bernal & Hutton, 1958 (original description)
Diploporus hemistoma Ozaki, 1928 accepted as Bianium hemistoma (Ozaki, 1928) Yamaguti, 1934 (original description)
Opecoelidae Ozaki, 1925 (identification resource)
Opecoelus Ozaki, 1925 (identification resource)
Opecoelus elongatus Ozaki, 1928 accepted as Paropecoelus elongatus (Ozaki, 1928) Pritchard, 1966 (original description)
Opecoelus lobatus Ozaki, 1925 (redescription)
Opecoelus quadratus Ozaki, 1928 accepted as Paropecoelus quadratus (Ozaki, 1928) Shimazu & Machida, 1985 (original description)
Opecoelus sphaericus Ozaki, 1925 (redescription)
Opegaster Ozaki, 1928 (original description)
Opegaster brevifistula Ozaki, 1928 (original description)
Opegaster ovatus Ozaki, 1928 accepted as Opegaster ovata Ozaki, 1928 (original description)
Opegaster rectus Ozaki, 1928 accepted as Opegaster recta Ozaki, 1928 (original description)