Hystrichosphaeridium brevispinosum subsp. callosum

"subsp. callosum" Sannemann, 1955, p.325–326, pl.1, figs.1–4,7; pl.3, figs.2–5,10; pl.4, figs.3–9; pl.6, figs.11–12; text-figs.2a–d.  Holotype: Sannemann, 1955, pl.4, fig.3.  NOW Baltisphaeridium brevispinosum subsp. callosum (Appendix A).  Originally Hystrichosphaeridium brevispinosum subsp. callosum, subsequently Buedingiisphaeridium brevispinosum subsp. callosum (combination not validly published; Appendix A), thirdly (and now) Baltisphaeridium brevispinosum subsp. callosum (Appendix A).  Age: Devonian (late Givetian).

Parent: Hystrichosphaeridium brevispinosum