Veryhachium geometricum Appendix A
From dinoflaj2
"geometricum" (Deflandre, 1945a, p.64-65, pl.2, figs.2-5) Stockmans and Willière, 1963, p.452. Holotype: Deflandre, 1945a, pl.2, fig.2. NOW Striatotheca geometrica (Appendix A). Originally Hystrichosphaeridium geometricum, subsequently Veryhachium geometricum, thirdly Veryhachium trispinosum subsp. geometricum (combination not validly published, Appendix A), fourthly (and now) Striatotheca geometrica (Appendix A). This combination was not validly published in Deunff (1954b, p.306), since that author did not fully reference the basionym or clearly use the name Veryhachium geometricum. Age: Mid Silurian.
Parent: Veryhachium
