Sirmiodiniopsis frisia

" frisia" (Raynaud, 1978, p.394, pl.1, fig.11) Lentin and Williams, 1981, p.256.  Holotype: Raynaud, 1978, pl.1, fig.11.  Originally Senoniasphaera?, subsequently Sirmiodiniopsis.  Taxonomic senior synonym: Meiourogonyaulax (as Ambonosphaera?) staffinensis, according to Poulsen and Riding (1992, p.26).  Age: Oxfordian-mid Valanginian.

Parent: Sirmiodiniopsis