Oligosphaeridium perforatum subsp. colum

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?subsp. colum Duxbury, 1983, p.53, pl.8, fig.9; text-fig.24.  Holotype: Duxbury, 1983, pl.8, fig.9; Fauconnier and Masure, 2004, pl.62, figs.1–3.  Originally Oligosphaeridium perforatum subsp. colum, subsequently (and now) Oligosphaeridium perforatum? subsp. colum.  Questionable assignment: Fauconnier and Cornu in Fauconnier and Masure (2004, p.403).  Age: late Aptian–early Albian.

Parent: Oligosphaeridium perforatum_Gocht 1959