Impletosphaeridium luxurium Eaton, 1976, p.309, pl.21, figs.3-4; text-fig.25F.
TYPE: Holotype: Eaton, 1976, pl.21, fig.3; Bujak et al., 1980, pl.5, fig.6.
AGE: Mid Eocene (see Aubry, 1986).