Hystrichosphaeridium polygonale

"polygonale" Eisenack, 1931, p.113.,pl.4, figs.16–20; pl.5, fig.18 ex Eisenack, 1938a, p.12.  Holotype: Eisenack, 1931, pl.4, fig.19 (as Ovum hispidum subsp. polygonale), lost according to Eisenack (1959, p.199).  Neotype: Paris and Deunff, 1970, pl.1, fig.4 (as Veryhachium splendens), designated by Fensome et al. (1990, p.235), which see.  NOW Polygonium polygonale (Appendix A).  Originally Ovum hispidum subsp. polygonale (combination not validly published; Appendix A), subsequently Hystrichosphaeridium polygonale, thirdly Baltisphaeridium polygonale (Appendix A), fourthly Veryhachium polygonale (combination not validly published; Appendix A), fifthly Goniosphaeridium polygonale (Appendix A), sixthly (and now) Polygonium polygonale (Appendix A).  Taxonomic junior synonyms: Impletosphaeridium? primordiale, according to Eisenack et al. (1973, p.497–498); Veryhachium (al. Goniosphaeridium) splendens Paris and Deunff, 1970, an acritarch species, by implication in Turner (1984, p.113–114), who believed Goniosphaeridium splendens to be the senior name; Hystrichosphaeridium (al. Baltisphaeridium) sexradiatum Timofeev, 1959, an acritarch species, according to Eisenack (1965c, p.261). The name Ovum hispidum subsp. polygonale was not validly published in Eisenack (1931) since the specific name Ovum hispidum was not validly published.  Age: Silurian (erratic).

Parent: Hystrichosphaeridium