Cordosphaeridium hirundo
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?hirundo (Eisenack, 1958a, p.404–405, pl.24, fig.12) Stover and Evitt, 1978, p.147. Emendation: Sarjeant, 1985a, p.76–77, as Achomosphaera hirundo. Holotype: Eisenack, 1958a, pl.24, fig.12. Originally Hystrichosphaeridium, subsequently Achomosphaera, thirdly Lanternosphaeridium, fourthly (and now) Cordosphaeridium?, fifthly Spiniferites?. Lentin and Williams (1989, p.74) questionably retained this species in Cordosphaeridium. Questionable assignment: Stover and Evitt (1978, p.47). N.I.A. Age: Early Cretaceous.
Parent: Cordosphaeridium