Cribroperidinium granomembranaceum

?granomembranaceum (Matsuoka, 1983b, p.121–122, pl.1, figs.1a–c,2,3a–b,4a–b,5a–b; text-figs.14A–B) Lentin and Williams, 1985, p.78.  Holotype: Matsuoka, 1983b, pl.1, figs.1a–c; Jan du Chêne et al., 1986a, pl.27, figs.1–2.  Originally Millioudodinium, subsequently (and now) Cribroperidinium?.  Questionable assignment: Lentin and Williams (1985, p.78).  Age: early-middle Miocene.

Parent: Cribroperidinium