Cordosphaeridium microtriainum var. microtriainum
From dinoflaj2
"var. microtriainum". Autonym. Holotype: Klumpp, 1953, pl.17, figs.6-7 and Sarjeant, 1981, pl.2, figs.1-2; text-fig.2. Now redundant. Parent: Cordosphaeridium microtriainum