Spiniferites microceras var. opisthophorus

"var. opisthophorus" Cookson and Eisenack, 1974, p.61, pl.22, fig.12.  Holotype: Cookson and Eisenack, 1974, pl.22, fig.12.  NOW Spiniferites microceras subsp. opisthophorus.  Originally Spiniferites microceras var. opisthophorus, subsequently (and now) Spiniferites microceras subsp. opisthophorus.  Age: Paleocene.

Parent: Spiniferites microceras