Oligosphaeridium patulum

patulum Riding and Thomas, 1988, p.80-82, pl.3, figs.1-3,5-6; text-figs.8a-b,9b.  Holotype: Riding and Thomas, 1988, pl.3, figs.1-2; Fauconnier and Masure, 2004, pl.60, fig.1.  Age: Early-Late Kimmeridgian.

Parent: Oligosphaeridium