Hystrichosphaeridium striatoconum

"striatoconum" Deflandre and Cookson, 1955, p.275, pl.2, fig.10; text-fig.36.  Holotype: Deflandre and Cookson, 1955, text-fig.36.  NOW Conosphaeridium.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Litosphaeridium?, fourthly (and now) Conosphaeridium.  This name was not validly published in Deflandre and Cookson (1954, p.1236), who did not provide a description.  Age: middle Senonian.

Parent: Hystrichosphaeridium