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
