Hystrichosphaera membranacea
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"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