Pterodinium alectrolophum
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"alectrolophum" (Sarjeant, 1966b, p.134-135, pl.15, figs.3-6; text-fig.34) Below, 1982d, p.352-353. Holotype: Sarjeant, 1966b, pl.15, figs.5-6; Jan du Chêne et al., 1986a, pl.54, figs.15-16. NOW Impagidinium. Originally Leptodinium, subsequently (and now) Impagidinium, thirdly Pterodinium. Age: mid Barremian.
Parent: Pterodinium