From Williams et al., 2017:

[Comasphaeridium, Staplin et al., 1965, p.192. Emendation: Sarjeant and Stancliffe, 1994, p. 25
Acritarch genus. For synonymy see Fensome et al. (1990, p.149)

Type species: originally as Micrhystridium cometes, Valensi, 1949 (fig.5, no.6)] ; Comasphaeridium cometes, Staplin et al., 1965