Baltisphaeridium hystrichoreticulatum Appendix A

"hystrichoreticulatum" (Eisenack, 1938a, p.20, pl.3, figs.6A–B) Downie and Sarjeant, 1965, p.91.  Holotype: Eisenack, 1938a, pl.3, figs.6A–B.  NOW Peteinosphaeridium (Appendix A).  Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Peteinosphaeridium (Appendix A).  This combination was not validly published in Downie and Sarjeant (1963, p.91), since these authors did not fully reference the basionym.  Age: Ordovician (erratic).

Parent: Baltisphaeridium_Appendix A