Hystrichogonyaulax canadensis

"canadensis" (Pocock, 1972, p.89, pl.24, figs.1–2; text-fig.4) Stover and Evitt, 1978, p.162.  Holotype: Pocock, 1972, pl.24, fig.1; Jan du Chêne et al., 1986a, pl.97, figs.1–4.  Originally Gonyaulacysta, subsequently Hystrichogonyaulax, thirdly Rhynchodiniopsis.  Taxonomic senior synonym: Gonyaulax (as Gonyaulacysta) cladophora, according to Fisher and Riley (1980, p.320) and Kunz (1990, p.23).  Age: Oxfordian–Kimmeridgian.

Parent: Hystrichogonyaulax