From Fensome et al., 2019:
Tubotuberella eisenackii ssp. oligodentata (Cookson and Eisenack, 1958, p.30, pl.2, fig.11) Stover and Evitt, 1978, p.198.
Holotype: Cookson and Eisenack, 1958, pl.2, fig.11; Jan du Chêne et al., 1986a, pl.125, figs.10–11.
Originally Gonyaulax eisenackii subsp. oligodentata (Appendix B), subsequently Gonyaulacysta eisenackii subsp. oligodentata, thirdly Endoscrinium eisenackii subsp. oligodentatum, fourthly Tubotuberella eisenackii subsp. oligodentata.
Taxonomic senior synonym: Gonyaulax (as and now Gonyaulacysta) eisenackii subsp. eisenackii, according to Sarjeant (1982b, p.32).

Locus typicus: Canning Basin, W Australia
Stratum typicum: Late Jurassic

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Original description: Cookson and Eisenack, 1958, p.30: Gonyaulax eisenackii ssp. oligodentata
Two specimens agree so well in shape, size and tabulation with G. eisenackii that they can be reffered without doubt to this species. However, they differ from it in the smooth or only minutely and sparingly denticulated sutures of the plates and transverse furrow, and for this reason have been seperated as a subspecies of the type. In the antapical region the outer membrane reaches considerably beyond the end of the body where, supported by 4 long processes, it forms a hollow cylinder.
Dimensions: Type - 96 x 57 µm; second specimen - 100 x 67 µm.