From Fensome et al., 2019:
Tenua biornata Jiabo, 1978, p.52, pl.22, figs.21–29; pl.23, figs.1–4.
Holotype: Jiabo, 1978, pl.22, fig.24.
Originally Tenua biornata, subsequently Kallosphaeridium biornatum (combination not validly published), thirdly
Kallosphaeridium biparatum, fourthly Batiacasphaera biornata, fifthly Sentusidinium biornatum.
Taxonomic senior synonym: Sentusidinium baculatum, according to Wood et al. (2016, p.83).
Age: early Tertiary.

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