From Fensome et al., 2019:
Exochosphaeridium solaster (Morgenroth, 1966a, p.25, pl.5, figs.8–9) Stover and Evitt, 1978, p.154. Holotype: Morgenroth, 1966a, pl.5, figs.8–9. Originally Cordosphaeridium, subsequently (and now) Exochosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.154). Age: Early Eocene.

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