Impletosphaeridium "elongatum" Lentin and Williams, 1989, p.197. Holotype: Jiabo, 1978, pl.29, fig.2. NOW Peltiphoridium oblongatum. Originally Bipolaribucina oblongatum, subsequently Impletosphaeridium oblongatum (combination illegitimate), thirdly Impletosphaeridium elongatum, fourthly (and now) Peltiphoridium oblongatum. Substitute name for Impletosphaeridium oblongatum (Jiabo, 1978, p.58, pl.29, figs.1-3) Chen et al., 1988, p.7 (an illegitimate name). Age: Early Tertiary.