Cordosphaeridium callosum

?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