Cannosphaeropsis filamentosa
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"filamentosa" Cookson and Eisenack, 1958, p.47-48, pl.7, figs.8-9; pl.8, figs.1-2. Holotype: Cookson and Eisenack, 1958, pl.7, fig.9. NOW Rigaudella. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly (and now) Rigaudella. Taxonomic junior synonym: Cannosphaeropsis perforata, according to Stancliffe and Sarjeant (1990, p.206). Age: Mid-Late Jurassic.
Parent: Cannosphaeropsis