Polysphaeridium ambiguum

"ambiguum" (Deflandre, 1937b, p.81, pl.16 [al. pl.13], figs.8-9) Yun Hyesu, 1981, p.44.  Holotype: Deflandre, 1937b, pl.16 (al. pl.13), fig.8; Fauconnier and Masure, 2004, pl.71, figs.6-7.  NOW Sepispinula?.  Originally Micrhystridium (Appendix A), subsequently Cleistosphaeridium, thirdly Polysphaeridium, fourthly Chlamydophorella, fifthly Dapsilidinium, sixthly Gorgonisphaeridium (Appendix A), seventhly (and now) Sepispinula?.  Taxonomic junior synonyms: Hystrichosphaeridium (now Sepispinula?) huguoniotii, according to Clarke and Verdier (1967, p.54) and Hystrichosphaeridium (now Sepispinula) ancoriferum, both according to Yun Hyesu (1981, p.44) and Schiøler and Wilson (1998, p.328) - however, Masure in Fauconnier and Masure (2004, p.499-500) retained Sepispinula ancorifera and Sepispinula? huguoniotii.  Age: Late Cretaceous.

Parent: Polysphaeridium