Hystrichosphaeridium stimuliferum Deflandre, 1938

Now Solisphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Solisphaeridium. See also Filisphaeridium (combination not validly published) and Micrhystridium (combination not validly published).

Holotype: Deflandre, 1938, pl.10, fig.10
Age: Late Jurassic