Spiniferites cornutus (Gerlach, 1961) Sarjeant, 1970; Emendation: Stover and Hardenbol, 1994, p.38–39, as Spiniferella cornuta.

Originally Hystrichosphaera, subsequently Spiniferites, now Spiniferella.

Holotype: Gerlach, 1961, pl.27, figs.10-12
Age: Middle Oligocene-Middle Miocene

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Below, 1982c, p. 33 (translated from German):

Note: In my opinion, the classification of some subspecies of Spiniferites cornutus is unjustified;
some of these must be assigned to other genera.
1) Spiniferites cornutus (Gerlach 1961) Sarjeant 1970 ssp. aspinatus Cookson & Eisenack 1974 has low parasutural septa like the species of the genus Gonyaulacysta.
2) Spiniferites conutus (Gerlach 1961) Sarjeant 1970 ssp. crassifurcatus Cookson & Eisenack 1974 and Goiniferites cornutus (Gerlach 1961) Sarjeant 1970 ssp. normalis Cookson & Eisenack 1974 is synonymous with Spiniferites cornutus (Gerlach 1961) Sarjeant 1970 ssp. laevimurus (Davey & Williams 1966) Lentin & Williams 1973. Spiniferites cornutus ssp. laevimurus differs significantly from Spiniferites cormutus (Gerlach 1961) Sarjeant 1970 due to its smooth membrane, and is therefore by no means a synonym of this species, as Cookson & Eisenack 1974 write.
3) Spiniferites cornutus (Gitmez 1961) Sarjeant 1970 ssp. opistophorus Cookson & Eisenack 1974 is synonymous with Spiniferites cornutus cornutus.
4) Spiniferites cornutus (Gerlach 1961) Sarjeant 1970 ssp. sinefurcatus Cookson & Eisenack 1974 is synonymous with Spiniferites ramosus (Ehrenberg 1838) Loeblich & Loeblich 1966 ssp. brevifurcatus (Cookson & Eisenack 1974) Lentin & Williams 1977. However, it is also possible that both forms are synonymous with Spiniferites speciosus (Deflandre 1937) Sarjeant 1970; at least, they belong to the range of variation of this species.