Phthanoperidinium alectrolophum
From dinoflaj3
alectrolophum Eaton, 1976, p.295,298, pl.17, figs.10–11; text-fig.23A. Holotype: Eaton, 1976, pl.17, fig.11; Bujak et al., 1980, pl.5, fig.9. Age: ?middle Eocene (see Aubry, 1986).
Parent: Phthanoperidinium