Hystrichosphaera membranacea

"membranacea" (Rossignol, 1964, p.86, pl.1, figs.4,9–10; pl.3, figs.7,12) Wall, 1967, p.102.  Holotype: Rossignol, 1964, pl.1, figs.4,9–10.  NOW Spiniferites membranaceus.  Originally Hystrichosphaera furcata var. membranacea, subsequently Hystrichosphaera ramosa var. membranacea, thirdly Hystrichosphaera membranacea, fourthly (and now) Spiniferites membranaceus, fifthly Gonyaulax membranacea.  This is a cyst equivalent of Gonyaulax spinifera (Claparède and Lachmann, 1859) Diesing, 1866, according to Dale (1976, table 2 — p.45) and Dodge (1989, p.289).  Age: Pleistocene–Holocene.

Parent: Hystrichosphaera