Baltisphaeridium echinoides Appendix A

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"echinoides" (Maier, 1959, p.318-319, pl.32, figs.5-6) Downie and Sarjeant, 1965, p.90.  Holotype: Maier, 1959, pl.32, fig.6.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly CleistosphaeridiumTaxonomic senior synonym: Xanthidium (now Spiniferites) ramosum, according to Sarjeant (1983, p.91-92).  This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym.  Age: mid Oligocene-Mid Miocene.

Parent: Baltisphaeridium_Appendix A