Palaeoperidinium ellipsoideum
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"?ellipsoideum" Deflandre, 1936b, p.178, pl.6, figs.5-7. Holotype: Deflandre, 1936b, pl.6, figs.6-7. Name not validly published: generic name not validly published until 1967. NOW Microdinium?. Originally Palaeoperidinium (name not validly published), subsequently (and now) Microdinium?, thirdly Microdinium, fourthly Palaeoperidinium? (combination not validly published). Questionable assignment: Stover and Evitt (1978, p.218) as a problematic species. This combination was not validly published in Stover and Evitt (1978, p.218) since these authors did not fully reference the basionym. Age: Senonian.
Parent: Palaeoperidinium