Bipolaribucina biornata

"?biornata" He Chengquan, Zhu Shenzhao and Jin Guangxing in He Chengquan et al., 1989, p.39, pl.22, figs.18–19.  Holotype: He Chengquan et al., 1989, pl.22, fig.18.  NOW Songiella.  Originally Bipolaribucina?, subsequently Distatodinium, thirdly (and now) Songiella.  Questionable assignment: He Chengquan, Zhu Shenzhao and Jin Guangxing in He Chengquan et al. (1989, p.39).  Taxonomic senior synonym: Membranilarnacia paucitubata, according to Mao Shaozhi et al. (1995, p.44) — however, He Chengquan et al. (2009, p.366) retained this species as Songiella biornata.  Age: Early Tertiary.

Parent: Bipolaribucina