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Goniosphaeridium apiculatum
Goniosphaeridium apiculatum (Timofeev, 1959) Wolf, 1980
Combination not validly published since Wolf, 1980 did not fully reference the basionym.
Now Baltisphaeridium (an acritarch genus). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (an acritarch genus), thirdly Goniosphaeridium (combination not validly published). Since the paper by Wolf, 1980 is biostratigraphic rather than taxonomic in emphasis, and since Wolf"s intentions with regard to this species were unclear, Fensome et al., 1990 retained this species in the acritarch genus Baltisphaeridium Eisenack, 1958.
Holotype: Timofeev, 1959, pl.4, fig.3
Age: Early Ordovician
Combination not validly published since Wolf, 1980 did not fully reference the basionym.
Now Baltisphaeridium (an acritarch genus). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (an acritarch genus), thirdly Goniosphaeridium (combination not validly published). Since the paper by Wolf, 1980 is biostratigraphic rather than taxonomic in emphasis, and since Wolf"s intentions with regard to this species were unclear, Fensome et al., 1990 retained this species in the acritarch genus Baltisphaeridium Eisenack, 1958.
Holotype: Timofeev, 1959, pl.4, fig.3
Age: Early Ordovician