Hystrichosphaeridium paracostatum

?paracostatum Cookson and Eisenack, 1974, p.65–66, pl.25, figs.11–13.  Holotype: Cookson and Eisenack, 1974, pl.25, fig.12.  Questionable assignment: Masure and Foucher in Fauconnier and Masure (2004, p.310).  Age: Albian–Senonian.

Parent: Hystrichosphaeridium