Baltisphaeridium mutabile Sannemann 1955 Appendix A
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"mutabile" (Sannemann, 1955, p.331, pl.5, figs.5-6; text-figs.17a-d) Downie and Sarjeant, 1965, p.93. Holotype: Sannemann, 1955, pl.5, fig.5. NOW Aldridgeisphaera (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Multiplicisphaeridium (Appendix A), fourthly (and now) Aldridgeisphaera (Appendix A). Junior homonym: Baltisphaeridium mutabile (Naumova, 1950) Downie and Sarjeant, 1965. See discussion in Fensome et al. (1990, p.111). This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym. Age: Devonian (Late Givetian).
Parent: Baltisphaeridium_Appendix A