Baltisphaeridium spiralisetum Appendix A

"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