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Adnatosphaeridium aemulum

"Adnatosphaeridium aemulum" (Deflandre, 1939a, p.187-189, pl.9, fig.12; pl.10, figs.5-8; pl.11, figs.1,7) Williams and Downie, 1969, p.17.

EMENDATION: Below, 1982b, p.139-140, as Rigaudella aemula.

TYPE: Holotype: Deflandre, 1939a, pl.11, fig.1; Eisenack and Kjellström, 1972, figure to left on p.43; Fensome et al., 1995, fig.1 - p.1473, fig.2 - p.1477.

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

SYNONYM(S): Taxonomic junior synonym: Cannosphaeropsis paucispina, according to Below (1982b, p.139).

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

AGE: Oxfordian.


Infraspecific taxa:


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