Hystrichosphaera bulloidea
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"bulloidea" Deflandre and Cookson, 1955, p.264, pl.5, figs.3-4. Holotype: Deflandre and Cookson, 1955, pl.5, figs.3-4. NOW Spiniferites. Originally Hystrichosphaera, subsequently (and now) Spiniferites. Taxonomic senior synonym: Xanthidium (as Spiniferites) ramosum, according to Harland (1977b, p.101-102) - however, Lentin and Williams (1981, p.259) retained Hystrichosphaera (as Spiniferites) bulloidea. Taxonomic junior synonym: Spiniferites nanus, according to Matsuoka (1983a, p.23) - however, Matsuoka (1991, table 2 - p.8) retained Spiniferites nanus. Motile equivalent: Gonyaulax scrippsiae Kofoid, 1911, according to Wall and Dale (1967, p.352; 1968c, p.270) - however, see Head (1996b, p.1205). Age: Eocene-Miocene.
Parent: Hystrichosphaera