Hystrichosphaera furcata var. membranacea Rossignol, 1964

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
Locus typicus: Ashkelon, lsrael
Stratum typicum: Pleistocene-Recent
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Rossignol, 1964, p. 86, pl.1, fig.4,9-10, pl.3, fig.7,12
Hystrichosphaera furcata var. membranacea var. nov.
The folds of the outer test wall, which delimit the plates, rise and connect two neighbouring processes in a continuous curve at or below the level of trifurcation; where the processes are very close, the veils merge over the major part of their length. We see that this disposition is already present in the forms typical of this species, for the groups of two processes which separate two adjacent plates of the equatorial band. Here, the two large dorsal processes may be fused over their entire lenght upto the trifurcation, like the other four of the same plate are over a lesser extent: the external test layer is nearly completely detached from the internal layer.
Dimensions: test 57 x 50 Ám, processes 20-25 Ám.