Impletosphaeridium oblongatum (Jiabo, 1978) Chen et al., 1988

Combination illegitimate; jr. homonym of Impletosphaeridium oblongatum Islam, 1983.
Now Impletosphaeridium elongatum. Originally Bipolaribucina oblongatum, subsequently Impletosphaeridium oblongatum (combination illegitimate), thirdly (and now) Impletosphaeridium elongatum.
Holotype: Jiabo, 1978, pl.29, fig.2
Age: Early Tertiary