Spiniferites microceras var. opisthophorus
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"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