Kallosphaeridium nigeriense
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nigeriense Jan du Chêne et al., 1985a, p.12, pl.4, figs.1-13. Holotype: Jan du Chêne et al., 1985a, pl.4, figs.1-3. Age: Late Paleocene (Thanetian)-Early Eocene (Ypresian).
Parent: Kallosphaeridium