From Williams et al., 2017:

[Korojonia, Cookson and Eisenack, 1958, p. 54
Acritarch genus, according to Stover and Evitt, 1978, and Fensome et al., 1991

Type species: Korojonia dubiosa, Cookson and Eisenack, 1958 (pl.12, fig.13)]

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Original description: Cookson and Eisenack, 1958:

Description:
Shell consisting of a smooth transparent broadly fusiform to oval membrane and an oval internal capsule.