Adnatosphaeridium aemulum

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"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.  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.  NOW Rigaudella.  Originally Hystrichosphaeridium, subsequently Cannosphaeropsis, thirdly Adnatosphaeridium, fourthly (and now) Rigaudella.  Taxonomic junior synonym: Cannosphaeropsis paucispina, according to Below (1982b, p.139).  This combination was not validly published in Williams and Downie (1966c, p.218), since these authors did not fully reference the basionym.  Age: Oxfordian.

Parent: Adnatosphaeridium

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