Adnatosphaeridium aemulum subsp. aemulum

"subsp. aemulum".  Autonym.  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 aemula subsp. aemula.  Originally Cannosphaeropsis aemula subsp. aemula, subsequently Adnatosphaeridium aemulum subsp. aemulum, thirdly (and now) Rigaudella aemula subsp. aemula. Parent: Adnatosphaeridium aemulum