Oligosphaeridium byersense
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byersense Duane, 1997, p.134–136, pl.3, figs.1–2,4–5; pl.4, figs.1–4; text-figs.5–6. Holotype: Duane, 1997, pl.3, fig.1; text-fig.5. Age: Valanginian.
Parent: Oligosphaeridium