From Fensome et al., 2019:
Wetzeliella? miniscula Alberti, 1961
Now Palaeotetradinium. Originally Wetzeliella subgenus Rhombodinium?, subsequently Rhombodinium?, thirdly Inversidinium, fourthly (and now) Palaeotetradinium. Alberti, 1961, questionably included this species in Wetzeliella subgenus Rhombodinium.
Taxonomic junior synonym: Inversidinium exilimurum, according to Stover and Evitt (1978, p.71).
Holotype: Alberti, 1961, pl.1, fig.10; pl.12, fig.4

Locus typicus: Hildesheim, Germany
Stratum typicum: Early Eocene

---------------------------------------------------------------------------------------------------

Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 10
Shell flattened, almost rhomboedrical; wepitheca triangular slightly elongated. Lateral horns short, indented at the free ends. Transverse furrow indicated. Epitheca shorter than the inverse hat-shaped hypotheca. With two antapical bulges, seperated by parallel to the longitudinal direction running gap. Presumably with a delicate inner body. The shell membrane is transparent, yellowish. A transverse furrow is indicated on one side (may be a fault). A pylome is questionable.