Spinidinium densispinatum
From dinoflaj2
"densispinatum" Stanley, 1965, p.226-227, pl.21, figs.1-5. Holotype: Stanley, 1965, pl.21, figs.1-3. NOW Magallanesium. Originally Spinidinium, subsequently (and now) Magallanesium. Taxonomic junior synonym: Spinidinium microceratum, according to Stone (1973, p.53-54). Age: Paleocene.
Parent: Spinidinium