Hystrichosphaeridium danicum

"danicum" (Wetzel, 1952, p.396–397, pl.A, figs.5–6; text-fig.8) Wetzel, 1955, p.34.  Emendation: Sarjeant, 1984c, p.129–130, as Achomosphaera danica.  Holotype: Wetzel, 1952, pl.A, fig.6; Dietz et al., 1999, text-fig.6b.  NOW Achomosphaera.  Originally Areoligera, subsequently Baltisphaeridium (Appendix A), thirdly Hystrichosphaeridium, fourthly Cleistosphaeridium?, fifthly (and now) Achomosphaera.  Taxonomic senior synonym: Areoligera senonensis, according to Lejeune-Carpentier and Sarjeant (1981, p.15) — however, Sarjeant (1984c, p.130) retained Hystrichosphaeridium (as Achomosphaera) danicum.  Age: Paleocene.

Parent: Hystrichosphaeridium