Senoniasphaera? frisia Raynaud, 1978

Originally Senoniasphaera?, subsequently Sirmiodiniopsis. Questionable assignment: Raynaud (1978, p.394).
Taxonomic senior synonym: Meiourogonyaulax (as Ambonosphaera?) staffinensis, according to Poulsen and Riding (1992, p.26).

Holotype: Raynaud, 1978, pl.1, fig.11
Age: Oxfordian-middle Valanginian