Cordosphaeridium fibrospinosum
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fibrospinosum Davey and Williams, 1966b, p.86, pl.5, fig.5. Emendation: Davey, 1969c, p.36, as a revised diagnosis for Cordosphaeridium fibrospinosum. Holotype: Davey and Williams, 1966b, pl.5, fig.5; Bujak et al., 1980, pl.7, figs.3,6. Originally (and now) Cordosphaeridium, subsequently Emmetrocysta?, thirdly Tityrosphaeridium?. Lentin and Williams (1989, p.74) retained this species in Cordosphaeridium. Taxonomic junior synonyms: Cordosphaeridium exilimurum and Achomosphaera (subsequently Cordosphaeridium) valianta, both according to Fensome et al. (2009, p.23). Age: early Eocene.
