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Hystrichosphaeridium echinoides

"Hystrichosphaeridium echinoides" Maier, 1959, p.318-319, pl.32, figs.5-6.

TYPE: Holotype: Maier, 1959, pl.32, fig.6.

HISTORY: Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium.

SYNONYM(S): Taxonomic senior synonym: Xanthidium (now Spiniferites) ramosum, according to Sarjeant (1983, p.91-92).

AGE: mid Oligocene-Mid Miocene.


Infraspecific taxa:


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