Hystrichodinium alatum
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"alatum" Cookson and Eisenack, 1962b, p.487–488, pl.2, figs.1–4. Emendation: Sarjeant, 1966b, p.147, as Xiphophoridium alatum. Holotype: Cookson and Eisenack, 1962b, pl.2, fig.1; Fensome et al., 1993a, fig.1 — p.893; Fauconnier and Masure, 2004, pl.80, fig.6. NOW Dinopterygium. Originally Hystrichodinium, subsequently Xiphophoridium, thirdly Pyramidium (combination illegitimate, since the generic name is illegitimate), fourthly Oodnadattia, fifthly (and now) Dinopterygium. Age: Albian–Cenomanian.
Parent: Hystrichodinium