Lithodinia mitra
From dinoflaj2
"mitra" (Dürr, 1987, p.74,77, figs.3a-b; fig.4, nos.3-6; fig.6, nos.1-3,5) Williams et al., 1993, p.55. Holotype: Dürr, 1987, fig.4, no.3; Dürr, 1988, pl.1, fig.5. NOW Semicavidinium. Originally Meiourogonyaulax, subsequently Lithodinia, thirdly (and now) Semicavidinium. N.I.A. Age: mid Kimmeridgian.
Parent: Lithodinia