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Appendix A

Baltisphaeridium brevispinosum subsp. callosum

Baltisphaeridium brevispinosum subsp. callosum (Sannemann, 1955, p.325-326, pl.1, figs.1-4,7; pl.3, figs.2-5,10; pl.4, figs.3-9; pl.6, figs.11-12; text-figs.2a-d) Fensome et al., 1990, p.87.

TYPE: Holotype: Sannemann, 1955, pl.4, fig.3.

HISTORY: Originally Hystrichosphaeridium brevispinosum subsp. callosum, subsequently Buedingiisphaeridium brevispinosum subsp. callosum (combination not validly published, Appendix A), thirdly (and now) Baltisphaeridium brevispinosum subsp. callosum.

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963 p.90), since these authors did not fully reference the basionym, nor was it validly published in Eisenack et al. (1973, p.79-80), since these authors did not give a clear indication of taxonomic rank.

AGE: Devonian (Late Givetian).


Infraspecific taxa:


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