Leptodinium quadrangulum

"quadrangulum" Yu Jingxian, 1982, p.242, pl.4, figs.10,13,15.  Holotype: Yu Jingxian, 1982, pl.4, fig.13.  Taxonomic senior synonym: Leptodinium impenseum, according to He Chengquan et al.  (2009, p.107).  Age: Late Jurassic–Early Cretaceous.

Parent: Leptodinium