Baltisphaeridium microspinosum Appendix A
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microspinosum (Eisenack, 1954a, p.209-210, pl.1, fig.8) Downie, 1959, p.60. Holotype: Eisenack, 1954a, pl.1, fig.8. Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium, thirdly Lophosphaeridium (Appendix A), fourthly Visbysphaera (Appendix A), fifthly Buedingiisphaeridium (combination not validly published, Appendix A). Eiserhardt (1992, p.12) retained this species in Baltisphaeridium. Taxonomic junior synonym: Baltisphaeridium listeri Kiryanov, 1978, an acritarch species, according to Le Hérissé (1989, p.210). Age: Silurian (Late Llandovery).
Parent: Baltisphaeridium
