Oligosphaeridium patulum
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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.
