Difference between revisions of "Micrhystridium hamatum Appendix A"

Revision as of 15:16, 2 December 2016

"hamatum" (Downie, 1958, p.335, pl.16, fig.1; text-figs.2j-k) Deflandre and Deflandre-Rigaud, 1965, fiche 2248.  Holotype: Downie, 1958, pl.16, fig.1.  NOW Baltisphaeridium hamatum (Appendix A).  Originally Hystrichosphaeridium hirsutoides var. hamatum, subsequently Baltisphaeridium hirsutoides var. hamatum (Appendix A), thirdly Micrhystridium hamatum, fourthly Acanthodiacrodium hamatum (Appendix A), fifthly (and now) Baltisphaeridium hamatum (Appendix A).  Age: Early Ordovician.