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Hystrichosphaeridium ordovicum
Hystrichosphaeridium ordovicum Timofeev, 1959
Now Baltisphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.
Holotype: Timofeev, 1959, pl.4, fig.20
Age: Early Ordovician
Now Baltisphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.
Holotype: Timofeev, 1959, pl.4, fig.20
Age: Early Ordovician