Astrononion gallowayi Loeblich & Tappan, 1953 accepted as Astrononion hamadaense Asano, 1950 (source of synonymy)
Bulimina nipponica Asano, 1958 accepted as Bulimina striata d'Orbigny in Guérin-Méneville, 1832 (source of synonymy)
Eggerella matsunoi Takayanagi, 2000 † (original description)
Elphidiella nagaoi Asano, 1938 accepted as Elphidiella arctica (Parker & Jones, 1864) (source of synonymy)
Elphidium advenum subsp. gorokuense Takayanagi, 1950 † accepted as Elphidium advenum (Cushman, 1922) accepted as Elphidium advena (Cushman, 1922) (source of synonymy)
Elphidium etigoense Husezima & Maruhasi, 1944 accepted as Elphidium bartletti Cushman, 1933 (source of synonymy)
Elphidium miyakoense (Ujiié & Kusukawa, 1969) accepted as Elphidium poeyanum (d'Orbigny, 1839) accepted as Elphidiononion poeyanum (d'Orbigny, 1839) accepted as Cribroelphidium poeyanum (d'Orbigny, 1839) (source of synonymy)
Elphidium subgranulosum Asano, 1938 accepted as Elphidium poeyanum (d'Orbigny, 1839) accepted as Elphidiononion poeyanum (d'Orbigny, 1839) accepted as Cribroelphidium poeyanum (d'Orbigny, 1839) (source of synonymy)
Globocassidulina mucronata Nomura, 1983 accepted as Globocassidulina subglobosa (Brady, 1881) (source of synonymy)
Haplophragmoides hatai Takayanagi, 2000 † (original description)
Haplophragmoides nishikizawensis Takayanagi, 2000 † (original description)
Islandiella islandica (Nørvang, 1945) accepted as Islandiella algida (Cushman, 1944) (source of synonymy)
Nonion aimonoi Matsunaga, 1963 accepted as Nonion affine (Reuss, 1851) accepted as Melonis affinis (Reuss, 1851) (source of synonymy)
Nonionella atlantica Cushman, 1947 accepted as Pseudononion japonicum Asano, 1936 (source of synonymy)
Siphotextularia masudai Asano, 1953 accepted as Siphotextularia rolshauseni Phleger & Parker, 1951 (source of synonymy)

 Synonymy

 for Islandiella islandica (Nørvang, 1945)

Scott et al. (2000) proposed a synonymy between Cassidulina sagamiensis Asano & Nakamura, 1937 and Islandiella ... [details]