Veryhachium trispinosum subsp. trisulcum Appendix A

"subsp. trisulcum" (Deunff, 1951, p.323, caption to text-fig.3 ex Deunff, 1959, p.27-28; pl.1, figs.1-4,8,10,12-14,16-17,20,22-23) Tynni, 1982, p.85.  Holotype: Deunff, 1959, pl.1, fig.4 (see Fensome et al., 1990, p.526, under Veryhachium trisulcum).  Combination not validly published: basionym not fully referenced.  Originally Hystrichosphaeridium trisulcum (name not validly published), subsequently Veryhachium trisulcum (name not validly published), thirdly Veryhachium trisulcum (Appendix A), fourthly Veryhachium trispinosum subsp. trisculum (combination not validly published).  Taxonomic senior synonym (at specific rank): Hystrichosphaeridium (now Veryhachium) trispinosum, according to Stancliffe and Sarjeant (1994, p.233).  Age: Mid Ordovician. Parent: Veryhachium trispinosum