Tenua microcysta
From dinoflaj3
"microcysta" Bujak in Bujak et al., 1980, p.88,90, pl.22, figs.2–5. 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: middle Eocene (see Aubry, 1986).
Parent: Tenua_Eisenack 1958a