Hystrichosphaeridium asymmetricum

"asymmetricum" Deflandre and Courteville, 1939, p.100–101, pl.4, figs.1–2.  Emendation: Clarke and Verdier, 1967, p.43, as Hexasphaera asymmetrica (combination illegitimate).  Holotype: Deflandre and Courteville, 1939, pl.4, fig.1; Fensome et al., 1993a, fig.1 — p.949.  NOW Callaiosphaeridium.  Originally Hystrichosphaeridium, subsequently (and now) Callaiosphaeridium, thirdly Hexasphaera.  Age: Senonian.

Parent: Hystrichosphaeridium