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Hystrichosphaeridium oligacanthum subsp. complanatum

"Hystrichosphaeridium oligacanthum subsp. complanatum" W. Wetzel, 1952, p.404-405, pl.A, figs.11a-b.

EMENDATION: Sarjeant, 1984c, p.142, as Solisphaeridium stimuliferum subsp. complanatum.

TYPE: Holotype: W. Wetzel, 1952, pl.A, figs.11a-b; Sarjeant, 1984c, pl.4, fig.6; text-fig.13.

HISTORY: NOW: Micrhystridium stimuliferum? subsp. complanatum (Appendix A). Originally Hystrichosphaeridium oligacanthum subsp. complanatum, subsequently Baltisphaeridium oligacanthum subsp. complanatum (Appendix A), thirdly Cleistosphaeridium? oligacanthum subsp. complanatum, fourthly Solisphaeridium stimuliferum subsp. complanatum (Appendix A), fifthly (and now) Micrhystridium stimuliferum? subsp. complanatum (Appendix A).

AGE: Paleocene.


Infraspecific taxa:


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