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Hystrichosphaeridium trisulcum
Hystrichosphaeridium trisulcum Deunf, 1951, p.323, caption to text-fig.3.
Name not validly published: no description.
Originally Hystrichosphaeridium trisculum (name not validly published), subsequently Veryhachium trisulcum (name not validly published), thirdly Veryhachium trisulcum, fourthly Veryhachium trispinosum subsp. trisulcum (combination not validly published).
Taxonomic senior synonym: Hystrichosphaeridium (now Veryhachium) trispinosum, according to Stancliffe and Sarjeant (1994, p.233).
Age: Middle Ordovician
Name not validly published: no description.
Originally Hystrichosphaeridium trisculum (name not validly published), subsequently Veryhachium trisulcum (name not validly published), thirdly Veryhachium trisulcum, fourthly Veryhachium trispinosum subsp. trisulcum (combination not validly published).
Taxonomic senior synonym: Hystrichosphaeridium (now Veryhachium) trispinosum, according to Stancliffe and Sarjeant (1994, p.233).
Age: Middle Ordovician