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Veryhachium trispinosum ssp. geometricum
Veryhachium trispinosum ssp. geometricum (Deflandre, 1945) Tynni, 1982
Combination not validly published since Tynni, 1982 did not fully reference the basionym.
Now Veryhachium geometricum (an acritarch species). Originally Hystrichosphaeridium geometricum, subsequently (and now) Veryhachium geometricum (an acritarch species), thirdly Veryhachium trispinosum ssp. geometricum (combination not validly published). Wicander, 1983 excluded
this taxon from his synonymy list for Veryhachium trispinosum.
Holotype: Deflandre, 1945, pl.2, fig.2
Age: Middle Silurian
Combination not validly published since Tynni, 1982 did not fully reference the basionym.
Now Veryhachium geometricum (an acritarch species). Originally Hystrichosphaeridium geometricum, subsequently (and now) Veryhachium geometricum (an acritarch species), thirdly Veryhachium trispinosum ssp. geometricum (combination not validly published). Wicander, 1983 excluded
this taxon from his synonymy list for Veryhachium trispinosum.
Holotype: Deflandre, 1945, pl.2, fig.2
Age: Middle Silurian