Cordosphaeridium callosum
From dinoflaj3
?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