Hystrichosphaeridium cristatum
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"cristatum" Downie, 1958, p.338-339, pl.16, fig.4; text-fig.4f. Holotype: Downie, 1958, pl.16, fig.4. NOW Cymatiogalea (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Priscogalea (Appendix A), fourthly (and now) Cymatiogalea (Appendix A). Taxonomic junior synonym: Cymatiogalea polygonomorpha Górka, 1967, an acritarch species, according to Rasul (1974, p.56). Age: Early Ordovician.
Parent: Hystrichosphaeridium
