Species within the genus Meioceras include:
- Species brought into synonymy
- Meioceras bermudezi Pilsbry & Aguayo, 1934: synonym of Meioceras cornucopiae Carpenter, 1859
- Meioceras bitumidum de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras boucheti Pizzini & Raines, 2011: synonym of Mauroceras boucheti (Pizzini & Raines, 2011) (original combination)
- Meioceras carpenteri de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras cingulatum Dall, 1892: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras constrictum Pilsbry & Aguayo, 1933: synonym of Meioceras cornucopiae Carpenter, 1859
- Meioceras contractum de Folin, 1874: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras cornubovis Carpenter, 1859: synonym of Meioceras cornucopiae Carpenter, 1859
- Meioceras coxi de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras crossei de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras deshayesi de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras fischeri de Folin, 1870: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras imiklis de Folin, 1870: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras kajiyamai Habe, 1963: synonym of Mauroceras kajiyamai (Habe, 1963) (original combination)
- Meioceras legumen (Hedley, 1899): synonym of Mauroceras legumen (Hedley, 1899)
- Meioceras leoni Bérillon, 1874: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras mariae de Folin, 1881: synonym of Meioceras cornucopiae Carpenter, 1859
- Meioceras moreleti de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras rhinoceros Pizzini, Raines & Vannozzi, 2013: synonym of Mauroceras rhinoceros (Pizzini, Raines & Vannozzi, 2013) (original combination)
- Meioceras sandwichense de Folin, 1881: synonym of Mauroceras sandwichense (de Folin, 1881) (original combination)
- Meioceras subinflexum de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
- Meioceras tenerum de Folin, 1869: synonym of Meioceras cubitatum de Folin, 1868
- Meioceras undulosum de Folin, 1869: synonym of Meioceras nitidum (Stimpson, 1851)
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