Millioudodinium diutinum
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"?diutinum" (Duxbury, 1977, p.34-35, pl.1, figs.3-4; text-fig.9) Sarjeant, 1982b, p.39. Holotype: Duxbury, 1977, pl.1, fig.3; text-fig.9; Jan du Chêne et al., 1986a, pl.41, figs.3-4. NOW Wrevittia?. Originally Gonyaulacysta, subsequently Millioudodinium?, thirdly (and now) Wrevittia?. Questionable assignment: Sarjeant (1982b, p.39). Taxonomic senior synonym: Gonyaulax (as Gonyaulacysta, now Wrevittia) helicoidea, according to Stover and Helby (1987d, p.287) - however, Jan du Chêne et al. (1986a, p.130) and Lentin and Williams (1989, p.152) retained Gonyaulacysta diutina. Age: Berriasian-Hauterivian.
Parent: Millioudodinium
