Oligosphaeridium diluculum

diluculum Davey, 1982b, p.14–15, pl.2, figs.1–5.  Holotype: Davey, 1982b, pl.2, figs.1–2; Fauconnier and Masure, 2004, pl.58, figs.1–3.  Age: late Ryazanian–early Valanginian.

Parent: Oligosphaeridium