Hystrichosphaeridium hirsutum subsp. amplum

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"subsp. amplum" Wetzel, 1955, p.38; text-fig.11.  Emendation: Sarjeant, 1984c, p.131, as Operculodinium centrocarpum subsp. amplum.  Holotype: Wetzel, 1955, text-fig.11; Sarjeant, 1984c, pl.3, figs.1-3; text-fig.4.  Name not validly published: species name not validly published.  NOW Operculodinium centrocarpum subsp. amplum.  Originally Hystrichosphaeridium hirsutum subsp. amplum (name not validly published), subsequently Baltisphaeridium hirsutum subsp. amplum (name not validly published; Appendix A), thirdly Operculodinium? hirsutum subsp. amplum (name not validly published), fourthly (and now) Operculodinium centrocarpum subsp. amplum.  Age: Danian. Parent: Hystrichosphaeridium hirsutum