Hystrichosphaeridium geometricum Deflandre 1945a

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"geometricum" Deflandre, 1945a, p.64-65, pl.2, figs.2-5.  Holotype: Deflandre, 1945a, pl.2, fig.2.  Junior homonym: Hystrichosphaeridium geometricum Pastiels, 1948NOW Striatotheca geometrica (Appendix A).  Originally Hystrichosphaeridium geometricum, subsequently Veryhachium geometricum (Appendix A), thirdly Veryhachium trispinosum subsp. geometricum (combination not validly published; Appendix A), fourthly (and now) Striatotheca geometrica (Appendix A).  Age: Mid Silurian.

Parent: Hystrichosphaeridium