From Williams et al., 2017:

[Cystodiniopsis, Vozzhennikova, 1963, p.185.

Tax. sr. syn.: Palaeocystodinium, by implication in Vozzhennikova (1967, p.152), who transferred the "type species" of Cystodiniopsis - Cystodiniopsis hyperxantha, to Palaeocystodinium.

Type species: Cystodiniopsis hyperxantha, Vozzhennikova, 1963 (fig.20)]