Spiniferites microceras subsp. opisthophorus
From dinoflaj3
subsp. opisthophorus (Cookson and Eisenack, 1974, p.61, pl.22, fig.12) Lentin and Williams, 1977b, p.152. Holotype: Cookson and Eisenack, 1974, pl.22, fig.12. Originally Spiniferites microceras var. opisthophorus, subsequently (and now) Spiniferites microceras subsp. opisthophorus. Age: Paleocene.
Parent: Spiniferites microceras