Meioceras elongatum de Folin, 1881, has been described from “mers de Chine” (China Seas) and was never recorded thereafter. The three syntypes are not conspecific and have probably a different origin. To stabilize the nomenclature, the specimen best fitting the original description and illustration is here selected as lectotype. As a consequence, Meioceras elongatum has to be considered a junior synonym of M. nitidum (Stimpson, 1851).