Areosphaeridium calicigerum
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calicigerum de Coninck, 1986b, p.10, pl.1, figs.8–13. Emendation: Michoux and Masure in Fauconnier and Masure, 2004, p.63. Holotype: de Coninck, 1986b, pl.1, figs.11–13; Fauconnier and Masure, 2004, pl.7, figs.1–3. Originally Areosphaeridium?, subsequently Surculosphaeridium?, thirdly (and now) Areosphaeridium. Questionable assignment: de Coninck (1986b, p.10) — however, Michoux and Masure in Fauconnier and Masure (2004, p.63) retained this species in Areosphaeridium without question (but did not acknowledge the earlier transfer to Surculosphaeridium). Age: late Eocene (Tongrian).
Parent: Areosphaeridium