Cannosphaeropsis filamentosa

"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: Middle-Late Jurassic.

Parent: Cannosphaeropsis