Spiniferites cornutus subsp. aspinatus
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"subsp. aspinatus" (Cookson and Eisenack, 1974, p.63, pl.23, fig.6) Lentin and Williams, 1977b, p.149. Holotype: Cookson and Eisenack, 1974, pl.23, fig.6. NOW Impagidinium aspinatum. Originally Spiniferites cornutus var. aspinatus, subsequently Spiniferites cornutus subsp. aspinatus, thirdly (and now) Impagidinium aspinatum. Age: Paleocene.
Parent: Spiniferites cornutus