From Fensome et al., 2019:
Ovoidinium ovale (Cookson and Eisenack, 1970a, p.145, pl.13, fig.8) Lentin and Williams, 1976, p.105. Holotype: Cookson and Eisenack, 1970a, pl.13, fig.8. Originally Ascodinium, subsequently (and now) Ovoidinium. Lentin and Williams (1989, p.270) retained this species in Ovoidinium. Age: Albian–Cenomanian.

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Locus typicus: Madura No. 1 Bore,
Stratum typicum: Albian-Cenomanian

Original description: Cookson and Eisenack, 1970, p.145: Ascodinium ovalis
Shell smooth, slightly flattened, oval in outline, thin-walled, with a large apical archeopyle and a short antapical projection slightly to one side of the antapex.
Capsule completely separated from the wall of the shell with a relatively thin, unornamented wall except at both apex and antapex, where small dot-like thickenings are evident. The capsule opens by the complete detachment of the apex.
Dimensions: Holotype: shell c. 35 µm long, c. 40 µm broad. Capsule c. 40x35 µm.