Hystrichosphaera ramosa var. gracilis
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"var. gracilis" Davey and Williams, 1966a, p.34-35, pl.1, fig.5; pl.5, fig.6. Holotype: Davey and Williams, 1966a, pl.5, fig.6; Bujak et al., 1980, pl.4, figs.1-2. NOW Spiniferites ramosus subsp. gracilis. Originally Hystrichosphaera ramosa var. gracilis, subsequently Spiniferites ramosus var. gracilis, thirdly (and now) Spiniferites ramosus subsp. gracilis. Taxonomic junior synonym (at subspecific rank): Hystrichosphaeridium plicatum, according to Sarjeant (1983, p.93). Age: Cenomanian-Eocene.
Parent: Hystrichosphaera ramosa