Rhombodinium majus
From dinoflaj3
?majus Yu Jingxian, 1982, p.257, pl.8, fig.8. Holotype: Yu Jingxian, 1982, pl.8, fig.8. Questionable assignment: Lentin and Williams (1985, p.307). Williams et al. (2015, p.311) recommended that the name be restricted to the holotype. Age: Late Jurassic–Early Cretaceous.
Parent: Rhombodinium