Bacchidinium polypes subsp. clavulum
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"subsp. clavulum" (Davey, 1969a, p.154-155, pl.6, figs.9-10) Lentin and Williams, 1981, p.24. Holotype: Davey, 1969a, pl.6, fig.9; Fauconnier and Masure, 2004, pl.50, fig.1. NOW Impletosphaeridium clavulum. Originally Cleistosphaeridium polypes var. clavulum, subsequently Cleistosphaeridium polypes subsp. clavulum, thirdly Bacchidinium polypes subsp. clavulum, fourthly Impletosphaeridium polypes subsp. clavulum, fifthly Cleistosphaeridium clavulum, sixthly (and now) Impletosphaeridium clavulum. This combination was not validly published in Davey (1979b, p.553), since that author did not fully reference the basionym. Age: Cenomanian. Parent: Bacchidinium polypes
