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Baltisphaeridium oligacanthum
Baltisphaeridium oligacanthum, (W. Wetzel, 1952), Downie and Sarjeant, 1965
Now Cleistosphaeridium?. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Cleistosphaeridium?, fourthly Laticavodinium. This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.
Holotype: W. Wetzel, 1952, pl.A, fig.8; Sarjeant, 1984, pl.2, figs.4-5; text-fig.2
Age: Danian
Now Cleistosphaeridium?. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Cleistosphaeridium?, fourthly Laticavodinium. This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.
Holotype: W. Wetzel, 1952, pl.A, fig.8; Sarjeant, 1984, pl.2, figs.4-5; text-fig.2
Age: Danian