Heterosphaeridium heteracanthum subsp. heteracanthum

subsp. heteracanthum.  Autonym.  Holotype: Deflandre and Cookson, 1955, pl.2, fig.5; Fauconnier and Masure, 2004, pl.35, figs.7-8.  Originally Hystrichosphaeridium heteracanthum subsp. heteracanthum, subsequently (and now) Heterosphaeridium heteracanthum subsp. heteracanthum, thirdly Heterosphaeridium? heteracanthum subsp. heteracanthum. Parent: Heterosphaeridium heteracanthum