Multiplicisphaeridium piriferum Appendix A
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"piriferum" (Eisenack, 1954a, p.206-207, pl.1, figs.1a-b; text-fig.1) Eisenack et al., 1973, p.737-739. Holotype: Eisenack, 1954a, pl.1, figs.1a-b. NOW Visbysphaera (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Multiplicisphaeridium, fourthly (and now) Visbysphaera (Appendix A). Taxonomic junior synonyms: Baltisphaeridium hermosum Cramer and Diez, 1968 (name not validly published), an acritarch species, according to Cramer (1970, p.148); Baltisphaeridium (now Visbysphaera) dilatispinosum, according to Eisenack (1965c, p.263) - however, Fensome et al. (1990, p.530) retained Baltisphaeridium (now Visbysphaera) dilatispinosum. Age: Silurian (Late Llandovery).
Parent: Multiplicisphaeridium_Appendix A