From Fensome et al., 2019:

"Evittia", Pocock, 1972, p.93.
Name illegitimate -- senior homonym: Evittia Brito, 1967, p.477 (Appendix A).
Substitute name: Pocockia.
Taxonomic senior synonym: Ovoidinium, by implication in Lentin and Williams (1976, p.162), who considered Pocockia to be a taxonomic junior synonym of Ovoidinium.
Taxonomic senior synonym: Ascodinium, by implication in Helenes (1983, p.258), who considered both Pocockia and Ovoidinium to be taxonomic junior synonyms of that genus -- however, Ovoidinium is now generally retained, with Deflandrea (as Ovoidinium) cincta assigned to it.
Type: Cookson and Eisenack, 1958, pl.4, fig.3, as Deflandrea cincta.

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Original description: [Pocock, 1972, p. 93]:

Diagnosis : Elongate amphipolar outline. Capsule distinct, spherical to sub-spherical. No distinct tabulation. Archeopyle apical with operculum that includes three reflected intercalary plates.
Named for Dr. W. R. Evitt of Stanford University.