Bipolaribucina pusilla

"pusilla" Liu Zhili and Zheng Yuefang in Liu Zhili et al., 1992, p.53–54, pl.12, figs.1–6.  Holotype: Liu Zhili et al., 1992, pl.12, fig.2.  Originally Bipolaribucina, subsequently Distatodinium.  Taxonomic senior synonym: Oligosphaeridium minus, according to He Chengquan et al.(2009, p.116).  Age: Early Tertiary.

Parent: Bipolaribucina