Hystrichosphaeridium duplum ssp. duplum

Autonym. Name illegitimate, since the species name is illegitimate.
Now Hystrichosphaeridium recurvatum ssp. recurvatum. Originally (and now) Hystrichosphaeridium recurvatum ssp. recurvatum, subsequently Hystrichosphaeridium palmatum ssp. palmatum (combination illegitimate), thirdly Hystrichosphaeridium duplum ssp. duplum (name illegitimate).

Age: Senonian