Oligosphaeridium porosum
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porosum Lentin and Williams, 1981, p.201. Holotype: Jain, 1977b, pl.1, fig.5. Originally Oligosphaeridium perforatum Jain, 1977b (name illegitimate), subsequently (and now) Oligosphaeridium porosum. Substitute name for Oligosphaeridium perforatum Jain, 1977b, p.181, pl.1, figs.5–7 (an illegitimate name). Age: early Albian.
Parent: Oligosphaeridium