Rhynchodiniopsis "granulata" (Klement, 1960, p.39–41, pl.4, figs.10–13; text-figs.18–20) Sarjeant, 1982b, p.35. Emendation: Sarjeant, 1984a, p.161–162, as Meristaulax granulata.

Holotype: Klement, 1960, pl.4, figs.10–11; text-figs.18–20; Fensome et al., 1995, figs.1–2 — p.1525; disintegrated according to Sarjeant (1984a, p.162). Lectotype (designated by Sarjeant, 1984a, p.162): Sarjeant, 1984a, pl.3, figs.3–4; text-fig.3; Jan du Chêne et al., 1986a, pl.27, figs.7–10; Brenner, 1988, pl.3, figs.2a–b; Fensome et al., 1995, figs.5–6 — p.1525 — however, Brenner (1988, p.35) argued that this specimen is not conspecific with the holotype. Lectotype (designated by Brenner, 1988, p.35): Brenner, 1988, pl.1, figs.3a–c; Fensome et al., 1995, figs.7–9 — p.1525. NOW Cribroperidinium. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Cribroperidinium, fourthly Rhynchodiniopsis, fifthly Meristaulax Sarjeant, sixthly Acanthaulax. Poulsen (1996, p.73) retained this species in Cribroperidinium. Taxonomic junior synonyms: Gonyaulax (as Cribroperidinium) venusta, according to Schrank (2005, p.56); Gonyaulax (now Cribroperidinium) granuligera, according to Fisher and Riley (1980, p.321) — however, Sarjeant (1984a, p.156–158) retained Gonyaulax (as Cryptarchaeodinium) granuligera; Gonyaulacysta (as Acanthaulax?, now Cribroperidinium) angulosa, according to Fisher and Riley (1980, p.321) — however, Sarjeant and Gocht in Sarjeant (1984a, p.160) retained Gonyaulacysta (as Meristaulax) angulosa. For further discussion, see Cribroperidinium granulatum. Age: middle Oxfordian–early Kimmeridgian.