Downiesphaeridium spinulastrum
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*spinulastrum (Islam, 1983b, p.337-338, pl.2, figs.1-2) Islam, 1993, p.84. Holotype: Islam, 1983b, pl.2, fig.1; Islam, 1993, pl.1, fig.11. Originally Cleistosphaeridium, subsequently (and now) Downiesphaeridium. Age: Mid Eocene.
Parent: Downiesphaeridium
