Palaeotetradinium minusculum

minusculum (Alberti, 1961, p.10–11, pl.1, fig.10; pl.12, fig.4) Stover and Evitt, 1978, p.71.  Holotype: Alberti, 1961, pl.1, fig.10.  Originally Wetzeliella subgenus Rhombodinium, subsequently Rhombodinium?, thirdly Inversidinium, fourthly (and now) Palaeotetradinium.  Taxonomic junior synonym: Inversidinium exilimurum, according to Stover and Evitt (1978, p.71).  Age: early Eocene.

Parent: Palaeotetradinium