Cordosphaeridium callosum
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?callosum Morgenroth, 1966a, p.21, pl.4, figs.8–10. Holotype: Morgenroth, 1966a, pl.4, figs.9–10. Originally Cordosphaeridium, subsequently (and now) Cordosphaeridium?, thirdly Tityrosphaeridium?. Lentin and Williams (1985, p.70) retained this species in Cordosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.147). Age: early Eocene.
Parent: Cordosphaeridium