Spiniferites cornutus ssp. cornutus

Autonym. Now redundant.
Taxonomic junior synonyms (at subspecific rank): Spiniferites cornutus var. opisthophorus (as Spiniferites cornutus subsp. opisthophorus), according to Below (1982c, p.33); Hystrichosphaera cornuta var. laevimura (as Spiniferites cornutus subsp. laevimurus, now Spiniferella cornuta subsp. laevimura), according to Cookson and Eisenack (1974, p.62) — however, Below (1982c, p.33) retained Spiniferites cornutus subsp. laevimurus (now Spiniferella cornuta subsp. laevimura).

Cookson and Eisenack, 1974, p. 62
The description by Gerlach requires a few additions: The apical horn, which takes up about 2/3 of the total length, is hollow, a fact which is still made clearer by pyrites-inclusions. The processes are thin and almost filamentous,and generally are short.
Up to now, the Sp. cornutus ssp. cornutus has not as yet been found in Australian deposits, however, other variants are found are found here.