Spinidinium microceratum

"microceratum" Stanley, 1965, p.227–228, pl.22, figs.5–6.  Holotype: Stanley, 1965, pl.22, fig.6.  Taxonomic senior synonym: Spinidinium (now Magallanesium) densispinatum, according to Stone (1973, p.53–54).  Age: Paleocene.

Parent: Spinidinium