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Appendix A

Baltisphaeridium mutabile

"Baltisphaeridium mutabile" (Sannemann, 1955, p.331, pl.5, figs.5-6; text-figs.17a-d) Downie and Sarjeant, 1965, p.93.

TYPE: Holotype: Sannemann, 1955, pl.5, fig.5.

HISTORY: 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.

COMMENTS: 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).


Infraspecific taxa:


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