Microdinium granulatum Jiabo 1978

"granulatum" (Jiabo, 1978, p.94, pl.6, figs.7-8) Lentin and Williams, 1989, p.244.  Holotype: Jiabo, 1978, pl.6, fig.7.  NOW Tetrachacysta.  Originally Dinogymnium, subsequently Microdinium, thirdly Dinogymniopsis, fourthly (and now) Tetrachacysta.  Junior homonym: Microdinium granulatum He Chengquan, 1991.  Age: Early Tertiary.

Parent: Microdinium