Isabelidinium amphiatum
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?amphiatum (McIntyre, 1975, p.65-66, pl.2, figs.5-8) Lentin and Williams, 1977a, p.167. Holotype: McIntyre, 1975, pl.2, figs.5-6. Originally Deflandrea, subsequently Isabelia (combination illegitimate), thirdly (and now) Isabelidinium?, fourthly Alterbia (combination illegitimate). Lentin and Williams (1985, p.199) retained this species in Isabelidinium. Questionable assignment: Lentin and Williams (1977a, p.167). Age: Campanian-Maastrichtian.
Parent: Isabelidinium