Gonyaulacysta dualis
From dinoflaj3
dualis (Brideaux and Fisher, 1976, p.18–20, pl.1, figs.4–6,8–12; pl.2, figs.1–2) Stover and Evitt, 1978, p.158. Holotype: Brideaux and Fisher, 1976, pl.1, figs.4–5; Jan du Chêne et al., 1986a, pl.37, figs.11–12. Originally Psaligonyaulax, subsequently (and now) Gonyaulacysta. Taxonomic senior synonym: Gonyaulax (as Gonyaulacysta) jurassica, according to Sarjeant (1982b, p.29) — however, Jan du Chêne et al. (1986a, p.131) retained Gonyaulacysta dualis. Taxonomic junior synonym: Psaligonyaulax australica, according to Brenner (1988, p.54). Age: late Oxfordian–late Kimmeridgian.
