From Williams et al., 2017:

[Quadrina, Bujak in Bujak et al., 1980, p.90
Acritarch genus, according to Bujak in Bujak et al., 1980, and Fensome et al., 1990

Type species: Quadrina pallida, Bujak et al., 1980 (pl.22, fig.9)]