Hystrichosphaeridium asymmetricum
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"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