Hystrichodinium pulchrum var. densispinum
From dinoflaj2
"var. densispinum" Deflandre, 1936b, p.183-184, pl.9, fig.3. Holotype: Deflandre, 1936b, pl.9, fig.3. NOW Hystrichodinium pulchrum subsp. densispinum. Originally Hystrichodinium pulchrum var. densispinum, subsequently (and now) Hystrichodinium pulchrum subsp. densispinum. Age: Senonian. Parent: Hystrichodinium pulchrum