Melitasphaeridium angustum Matsuoka, 1983b, p.115-116, pl.3, figs.6a-b; pl.4, figs.1a-b,2a-b,4.
TYPE: Holotype: Matsuoka, 1983b, pl.4, figs.2a-b.
AGE: Pliocene-Early Pleistocene.