Cleistosphaeridium microcystum
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"microcystum" (Bujak in Bujak et al., 1980, p.88,90, pl.22, figs.2-5) Lentin and Williams, 1981, p.49. Holotype: Bujak et al., 1980, pl.22, figs.2-3; Fauconnier and Masure, 2004, pl.64, figs.4-5. NOW Pilosidinium. Originally Tenua Eisenack, subsequently Cleistosphaeridium, thirdly Sentusidinium, fourthly (and now) Pilosidinium. Age: Mid Eocene (see Aubry, 1986).
Parent: Cleistosphaeridium
