Meioceras
Lectotype of Meioceras nitidum at MNHN, Paris
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Truncatelloidea
Family:	Caecidae
Genus:	Meioceras Carpenter, 1859
Type species
Meioceras cornucopiae Carpenter, 1859
Synonyms
Caecum (Meioceras) Carpenter, 1859

Meioceras is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Caecidae.^[1]

Species

Species within the genus Meioceras include:

• Meioceras cornucopiae Carpenter, 1858^[2]
• Meioceras cubitatum Folin, 1868^[3]
• † Meioceras mateldae Selli, 1974
• Meioceras nitidum (Stimpson, 1851)^[4]
• Meioceras tumidissimum de Folin, 1869

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)