Operculodinium hirsutum subsp. varians
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"subsp. varians" (Wetzel, 1933b, p.47–48, pl.4, figs.27–29) Lentin and Williams, 1973, p.102. Holotype: not designated. Lectotype: Wetzel, 1933b, fig.29; designated by Lentin and Williams (1989, p.78). NOW Coronifera? striolata subsp. varians. Originally Hystrichosphaera hirsuta subsp. varians (name not validly published), subsequently Baltisphaeridium hirsutum forma varians (name not validly published; Appendix A), thirdly Operculodinium? hirsutum subsp. varians (name not validly published), fourthly (and now) Coronifera? striolata subsp. varians. Age: Late Cretaceous.
Parent: Operculodinium hirsutum