Sentusidinium bifidum

?bifidum (Jiabo, 1978, p.51–52, pl.22, figs.7–16) He Chengquan, Zhu Shenzhao and Jin Guangxing in He Chengquan et al., 1989, p.66–67, pl.16, figs.17–23.  Holotype: Jiabo, 1978, pl.22, fig.8.  Originally Tenua Eisenack, subsequently Cleistosphaeridium?, thirdly (and now) Sentusidinium.  Questionable assignment: Xu Jinli et al. (1997, p.46); and Courtinat in Fauconnier and Masure (2004, p.486) as a problematic species.  Islam (1993, p.87) also proposed this combination.  Age: Early Tertiary.

Parent: Sentusidinium