Membranophoridium perforatum
From dinoflaj3
perforatum Wilson, 1988, p.26, pl.16, figs.5a–b,6a–b. Holotype: Wilson, 1988, pl.16, figs.5a–b; Fensome et al., 1996, figs.1–2 — p.2271. This name was not validly published in Wilson (1985, p.93) since no description or illustration was provided. Age: early Eocene.
