From Williams et al., 2017:

[Polygonium, Vavrdová, 1966, p .412–413; Emendations: Le Hérissé, 1989, p. 181; Sarjeant and Stancliffe, 1994, p. 42.
Acritarch genus, according to Sarjeant and Stancliffe (1996, p.358). See also Fensome et al. (1990, p.405).

Type species: as Polygonium gracile, Vavrdová, 1966 (pl.1, fig.3; text-fig.3b (not pl.2, fig.3))]