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Hystrichosphaeridium geometricum

"Hystrichosphaeridium geometricum" Deflandre, 1945a, p.64-65, pl.2, figs.2-5.

TYPE: Holotype: Deflandre, 1945a, pl.2, fig.2.

HISTORY: NOW: 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).

JUNIOR HOMONYM: Hystrichosphaeridium geometricum Pastiels, 1948.

AGE: Mid Silurian.


Infraspecific taxa:


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