Palaeoceratium operculatum (O. Wetzel, 1933) O. Wetzel, 1948.

Combination not validly published: the generic name Palaeoceratium is not validly published.
NOW Odontochitina. Originally Ceratium subgenus Euceratium, subsequently Palaeoceratium subgenus Euceratium (combination not validly published), thirdly (and now) Odontochitina.
Taxonomic junior synonym: Odontochitina silicorum, according to Deflandre and Cookson (1955, p.292).

Holotype: O. Wetzel, 1933, pl.2, fig.21
Age: Senonian