Baltisphaeridium longispinosum Appendix A

*longispinosum (Eisenack, 1931, p.110-111, pl.5, figs.6-17 ex Wetzel, 1933b, p.44) Eisenack, 1959, p.194-195.  Holotype: Eisenack, 1931, pl.5, fig.10, as Ovum hispidum subsp. longispinosum, lost according to Eisenack (1959, p.194).  Neotype: Eisenack, 1959, pl.15, fig.1, designated by Eisenack (1959, p.194).  Originally Ovum hispidum subsp. longispinosum (name not validly published, Appendix A), subsequently Hystrichosphaera longispinosa (name not validly published), thirdly Hystrichosphaeridium longispinosum, fourthly (and now) Baltisphaeridium longispinosum, fifthly Micrhystridium longispinosum (combination not validly published, Appendix A).  This combination was not validly published in Eisenack (1958a, p.398), since that author did not fully reference the basionym.  The name Ovum hispidum subsp. longispinosum was not validly published in Eisenack (1931) since the specific name Ovum hispidum was not validly published.  Age: Ordovician (erratic).

Parent: Baltisphaeridium