Alterbidinium ambiguum

ambiguum (He Chengquan, 1991, p.72–73, pl.29, figs.1–6) Lentin and Williams, 1993, p.21.  Holotype: He Chengquan, 1991, pl.29, fig.3.  Originally Alterbia (generic name illegitimate), subsequently (and now) Alterbidinium.  Age: Cenomanian–middle Eocene.

Parent: Alterbidinium