Achomosphaera ?convexa, Sah et al., 1970, p. 145-146, pl.1, figs.12–13

Originally Achomosphaera, subsequently (and now) Achomosphaera?. Questionable assignment: Stover and Evitt (1978, p.139).

Holotype: Sah et al., 1970, pl.1, fig.12.
Age: Late Cretaceous.