Bipolaribucina oblongata, Jiabo, 1978

Now Impletosphaeridium elongatum. Originally Bipolaribucina oblongatum, subsequently (and now) Impletosphaeridium elongatum; see also Impletosphaeridium oblongatum (Jiabo, 1978 ex Lentin and Williams, 1981) Chen et al., 1988, which is a junior homonym of Impletosphaeridium oblongatum Islam, 1983.

Holotype: Jiabo, 1978, pl.29, fig.2
Age: Early Tertiary