Hystrichosphaeridium intermedium Eisenack 1954a

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"intermedium" Eisenack, 1954a, p.208, pl.1, figs.3,9; text-figs.3-4.  Holotype: Eisenack, 1954a, pl.1, fig.3.  Name illegitimate - senior homonym: Hystrichosphaeridium intermedium (Wetzel, 1933b) Deflandre, 1937a.  Substitute name: Hystrichosphaeridium mesonNOW Visbysphaera mesa (Appendix A).  Originally Hystrichosphaeridium intermedium (name illegitimate), subsequently Hystrichosphaeridium meson, thirdly Baltisphaeridium meson (Appendix A), fourthly (and now) Visbysphaera mesa (Appendix A), fifthly Multiplicisphaeridium meson (Appendix A).  Taxonomic junior synonym: Baltisphaeridium (subsequently Multiplicisphaeridium) micropilare Cramer, 1970, an acritarch species, according to Ye Xiaorong (1984, p.42).  Age: Silurian (Late Llandovery-Late Ludlow).

Parent: Hystrichosphaeridium