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Appendix A

Baltisphaeridium plicatum

"Baltisphaeridium plicatum" (Maier, 1959, p.318, pl.33, fig.1) Downie and Sarjeant, 1965, p.94.

TYPE: Holotype: Maier, 1959, pl.33, fig.1.

HISTORY: Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.

SYNONYM(S): Taxonomic senior synonym (at subspecific rank): Hystrichosphaera ramosa var. gracilis (now Spiniferites ramosus subsp. gracilis), according to Sarjeant (1983, p.93).

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.92), since these authors did not fully reference the basionym.

AGE: mid Oligocene.


Infraspecific taxa:


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