Senoniasphaera tabulata
From dinoflaj3
"tabulata" Backhouse and Helby in Helby, 1987, p.317–319, figs.21A–G,22A–C,23. Holotype: Helby, 1987, figs.21A–B; Fensome et al., 1996, figs.1–2 — p.2395. Taxonomic senior synonym: Muderongia simplex, according to Riding et al. (2001), p.29. Age: Hauterivian.