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Bipolaribucina biornata
Bipolaribucina "?biornata", He Chengquan, Zhu Shenzhao and Jin Guangxing in He Chengquan et al., 1989, p.39, pl.22, figs.18–19.
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.
Holotype: He Chengquan et al., 1989, pl.22, fig.18.
Age: Early Tertiary.
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.
Holotype: He Chengquan et al., 1989, pl.22, fig.18.
Age: Early Tertiary.