Lingulodinium "sadoense" Matsuoka, 1983b, p.124, pl.10, figs.1a-c,2-3,4a-b,5-7.
Holotype: Matsuoka, 1983b, pl.10, figs.1a-c.
Taxonomic senior synonym: Hystrichosphaeridium (as and now Lingulodinium) machaerophorum, according to Kokinos and Anderson (1995, p.162).
Age: Early Pleistocene.