Ovum hispidum ssp. brevispinosum Eisenack, 1931

NOW Pachysphaeridium brevispinosum. Originally Ovum hispidum subsp. brevispinosum (name not validly published), subsequently Hystrichosphaeridium brevispinosum, thirdly Baltisphaeridium brevispinosum, fourthly Buedingiisphaeridium brevispinosum (combination not validly published), fifthly (and now) Pachysphaeridium brevispinosum.

Holotype: Eisenack, 1931, pl.5, fig.3; lost, according to Eisenack, 1959
Neotype: Eisenack, 1959, pl.15, fig.13; designated by Eisenack, 1959
Age: Silurian