Hystrichosphaera ramosa var. membranacea (Rossignol, 1964) Davey and Williams, 1966b

NOW Spiniferites membranaceus. Originally Hystrichosphaera furcata var. membranacea, subsequently Hystrichosphaera ramosa var. membranacea, thirdly Hystrichosphaera membranacea, fourthly (and now) Spiniferites membranaceus, fifthly Gonyaulax membranacea.
Motile equivalent: Gonyaulax spinifera (Claparède and Lachmann, 1859) Diesing, 1866, according to Dale (1976, table 2 — p.45) and Dodge (1989, p.289).

Holotype: Rossignol, 1964, pl.1, figs.4,9-10
Age: Pleistocene-Recent