Spiniferites nanus Matsuoka, 1976, p.111

Taxonomic senior synonym: Hystrichosphaera (as Spiniferites) bulloidea, according to Matsuoka (1983a, p.23) - however, Matsuoka (1991, table 2 — p.8) retained Spiniferites nanus.

Holotype: Matsuoka, 1976, pl.28, figs.1-2
Age: Pleistocene