Microdinium amphidoxosum

"amphidoxosum" (Jiabo, 1978, p.93, pl.6, fig.2) Lentin and Williams, 1989, p.243.  Holotype: Jiabo, 1978, pl.6, fig.2.  NOW Tetrachacysta.  Originally Dinogymnium?, subsequently Microdinium, thirdly (and now) Tetrachacysta.  Age: Early Tertiary.

Parent: Microdinium