Baltisphaeridium spiralisetum Appendix A
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"spiralisetum" (de Wit, 1943, p.383; text-figs.2,11) Downie and Sarjeant, 1965, p.97. Holotype: de Wit, 1943, text-figs.2,11, lost according to de Wit (personal communication to GLW). NOW Impletosphaeridium?. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Cleistosphaeridium, fourthly (and now) Impletosphaeridium?. Age: Late Cretaceous.
Parent: Baltisphaeridium_Appendix A