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Palaeoperidinium alatum
Palaeoperidinium "?alatum" Conrad, 1941, p.5, pl.1, fig.C.
Holotype: Conrad, 1941, pl.1, fig.C. Name not validly published: generic name not validly published until 1967.
NOW Microdinium?. Originally Palaeoperidinium (name not validly published), subsequently (and now) Microdinium?, thirdly 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: Maastrichtian.
Holotype: Conrad, 1941, pl.1, fig.C. Name not validly published: generic name not validly published until 1967.
NOW Microdinium?. Originally Palaeoperidinium (name not validly published), subsequently (and now) Microdinium?, thirdly 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: Maastrichtian.