Solisphaeridium seminudum Appendix A
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"?seminudum" (Wetzel, 1952, p.405, text-fig.26) Sarjeant, 1984a, p.143. Holotype: Wetzel, 1952, text-fig.26. NOW Micrhystridium? (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Solisphaeridium, fourthly (and now) Micrhystridium (Appendix A). Questionable assignment: Sarjeant (1984a, p.143). Age: Paleocene (Danian).
Parent: Solisphaeridium
