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Callaiosphaeridium asymmetricum

*Callaiosphaeridium asymmetricum (Deflandre and Courteville, 1939, p.100-101, pl.4, figs.1-2) Davey and Williams, 1966b, p.104.

EMENDATION: Clarke and Verdier, 1967, p.43, as Hexasphaera asymmetrica.

TYPE: Holotype: Deflandre and Courteville, 1939, pl.4, fig.1; Fensome et al., 1993a, fig.1 - p.949.

HISTORY: Originally Hystrichosphaeridium, subsequently (and now) Callaiosphaeridium, thirdly Hexasphaera (combination illegitimate).

AGE: Senonian.


Infraspecific taxa:


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