Achomosphaera ramulifera subsp. perforata
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subsp. perforata (Davey and Williams, 1966a, p.50, pl.5, figs.1,4) Lentin and Williams, 1973, p.10. Holotype: Davey and Williams, 1966a, pl.5, fig.4; Bujak et al., 1980, pl.5, fig.1; Fensome et al., 1991, fig.2 - p.705; fig.3 - p.721. Originally Achomosphaera ramulifera var. perforata, subsequently (and now) Achomosphaera ramulifera subsp. perforata. Age: Early Eocene. Parent: Achomosphaera ramulifera
