Pseudoceratium polymorphum
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"polymorphum" (Eisenack, 1958a, p.394, pl.22, figs.5–12; pl.24, fig.5) Bint, 1986, p.145. Emendation: Dörhöfer and Davies, 1980, p.34–36, as Aptea polymorpha. Holotype: Eisenack, 1958a, pl.22, fig.5; Sarjeant, 1985a, pl.7, fig.4. NOW Aptea. Originally (and now) Aptea, subsequently Pseudoceratium. Taxonomic junior synonym: Aptea (now Pseudoceratium) eisenackii, according to Cookson and Eisenack (1974, p.74) — however, Below (1981a, p.7) retained Aptea eisenackii. Age: Aptian.
