Hystrichosphaeridium claviculorum Deflandre, 1938; Emendation: Sarjeant, 1968, p.233, as Solisphaeridium claviculorum.

Now Solisphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Solisphaeridium. Stover and Evitt, 1978, considered this to be a problematical species of Hystrichosphaeridium.

Holotype: Deflandre, 1938, pl.10, fig.4
Age: Late Jurassic