From Fensome et al., 2019:
Spiniferites ramosus ssp. granosus (Davey and Williams, 1966a, p.35, pl.4, fig.9) Lentin and Williams, 1973, p.130. Holotype: Davey and Williams, 1966a, pl.4, fig.9. Originally Hystrichosphaera ramosa var. granosa, subsequently Spiniferites ramosus var. granosus, thirdly (and now) Spiniferites ramosus subsp. granosus. Age: Early Eocene.

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Locus typicus: Sheppey, Kent, England
Stratum typicum: Early Eocene

Original diagnosis: Davey and Williams, 1966, p. 35: Hystrichosphaera ramosa ssp. granosa
A variety of H. ramosa (Ehrenberg) similar to H. ramosa var. gracilis except that the surface of the central body is coarsely granular. Height of granules ranging up to 0.5 µm.

Dimensions:
Holotype: diameter of central body 35 by 42 µm, length of processes up to 19 µm.
Range: diameter of central body 33-45 µm, length of processes up to 19 µm.