Impletosphaeridium elongatum
From dinoflaj3
"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.
Parent: Impletosphaeridium