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Sentusidinium bifidum
From Fensome et al., 2019:
Sentusidinium 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, fourthly Sentusidinium?. Questionable assignment: Xu Jinli et al. (1997, p.46); and Courtinat in Fauconnier and Masure (2004, p.486) as a problematic species; however, Wood et al. (2016, p.83 accepted the assignment to Sentusidinium without question. Taxonomic senior synonym: Batiacasphaera baculata, according to Wood et al. (2016, p.83); however, as the name Sentusidinium baculatum already exists, "bifidum" is the senior legitimate epithet for this species when combined with Sentusidinium. Taxonomic junior synonyms: Batiacasphaera biornata subspecies crassa, Batiacasphaera kutharensis, Sentusidinium fibrosum and Batiacasphaera brachyspinosa, all according to Wood et al. (2016, p.83). As the name was originally Tenua bifidis, the correct name is Sentusidinium bifidum, not Sentusidinium bifidum. Islam (1993, p.87) also proposed this combination. Age: early Tertiary.
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Sentusidinium 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, fourthly Sentusidinium?. Questionable assignment: Xu Jinli et al. (1997, p.46); and Courtinat in Fauconnier and Masure (2004, p.486) as a problematic species; however, Wood et al. (2016, p.83 accepted the assignment to Sentusidinium without question. Taxonomic senior synonym: Batiacasphaera baculata, according to Wood et al. (2016, p.83); however, as the name Sentusidinium baculatum already exists, "bifidum" is the senior legitimate epithet for this species when combined with Sentusidinium. Taxonomic junior synonyms: Batiacasphaera biornata subspecies crassa, Batiacasphaera kutharensis, Sentusidinium fibrosum and Batiacasphaera brachyspinosa, all according to Wood et al. (2016, p.83). As the name was originally Tenua bifidis, the correct name is Sentusidinium bifidum, not Sentusidinium bifidum. Islam (1993, p.87) also proposed this combination. Age: early Tertiary.
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