Alterbidinium pentaradiatum subsp. precedum
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subsp. precedum (Cookson and Eisenack, 1974, p.49, pl.20, figs.1-2) Lentin and Williams, 1985, p.15. Holotype: Cookson and Eisenack, 1974, pl.20, fig.1. Originally Deflandrea pentaradiata subsp. preceda, subsequently Alterbia? pentaradiata subsp. preceda (combination illegitimate), thirdly (and now) Alterbidinium? pentaradiatum subsp. precedum. Age: Paleocene. Parent: Alterbidinium pentaradiatum
