Baltisphaeridium hamatum Appendix A

hamatum (Downie, 1958, p.335, pl.16, fig.1; text-figs.2j–k) Kjellström, 1976, p.18.  Holotype: Downie, 1958, pl.16, fig.1.  Originally Hystrichosphaeridium hirsutoides var. hamatum, subsequently Baltisphaeridium hirsutoides var. hamatum (Appendix A), thirdly Micrhystridium hamatum (Appendix A), fourthly Acanthodiacrodium hamatum (Appendix A), fifthly (and now) Baltisphaeridium hamatum.  Age: Early Ordovician.

Parent: Baltisphaeridium_Appendix A