Spiniferites cornutus subsp. aspinatus

"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