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Adnatosphaeridium filamentosum

"Adnatosphaeridium filamentosum" (Cookson and Eisenack, 1958, p.47-48, pl.7, figs.8-9; pl.8, figs.1-2) Williams and Downie, 1969, p.17.

TYPE: Holotype: Cookson and Eisenack, 1958, pl.7, fig.9.

HISTORY: NOW: Rigaudella. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly (and now) Rigaudella.

SYNONYM(S): Taxonomic junior synonym: Cannosphaeropsis perforata, according to Stancliffe and Sarjeant (1990, p.206).

COMMENTS: This combination was not validly published in Williams and Downie (1966c, p.218), since these authors did not fully reference the basionym.

AGE: Mid-Late Jurassic.


Infraspecific taxa:


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