Baltisphaeridium brevispinosum var. nanus Appendix A

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"var. nanus" (Deflandre, 1945a, p.62–63, pl.1, figs.5–7) Downie, 1959, p.59.  Holotype: Deflandre, 1945a, pl.1, figs.5–6.  Combination not validly published: basionym not fully referenced.  NOW Polygonium nanus (Appendix A).  Originally Hystrichosphaeridium brevispinosum var. nanus, subsequently Baltisphaeridium brevispinosum var. nanus (combination not validly published), thirdly Baltisphaeridium nanus (combination not validly published, Appendix A), fourthly Micrhystridium nanus (Appendix A), fifthly (and now) Polygonium nanus (Appendix A), sixthly Solisphaeridium nanus (Appendix A).  Taxonomic junior synonym: Baltisphaeridium brevispinosum var. wenlockense (subgenus Salopidium wenlockense) Downie, 1959, an acritarch taxon, according to Lister (1970, p.54).  N.I.A.  Age: Silurian.

Parent: Baltisphaeridium brevispinosum_Appendix A

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