Hystrichosphaeridium picorricum
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"picorricum" (Cramer, 1964, p.303-304, pl.11, figs.1-3; text-fig.24) Andreeva, 1973, p.192. Holotype: Cramer, 1964, pl.11, fig.2. Combination not validly published: basionym not fully referenced. Originally Micrhystridium (Appendix A), subsequently Multiplicisphaeridium (Appendix A), thirdly Hystrichosphaeridium (combination not validly published). Taxonomic senior synonym: Baltisphaeridium (now Multiplicisphaeridium) cladum Downie, 1963, an acritarch species, according to Colbath (1979, p.20-21). Age: Devonian (Mid Siegenian-Emsian).
Parent: Hystrichosphaeridium
