From Fensome et al., 2019:
Valvaeodinium aquilonium (Dörhöfer and Davies, 1980, p.24,26, figs.26E,I,28A–H) Below, 1987b, p.69.
Emendation: Below, 1987b, p.69, as Valvaeodinium aquilonium. Holotype: Dörhöfer and Davies, 1980, fig.26E.
Originally Comparodinium, subsequently (and now) Valvaeodinium.
Age: Toarcian–Bajocian/Bathonian.

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Originally Comparodinium, subsequently (and now) Valvaeodinium.
Holotype: Dörhöfer and Davies, 1980, fig.26E
Locus typicus: Elf Wilkins E-60 well, 1950 ft., Mackenzie King Island, Sverdrup Basin, Arctic Canada
Stratum typicum: Toarcian-Bajocian/Bathonian

Original diagnosis: Dörhöfer and Davies, 1980, p.24: Comparodinium aquilonium
A proximate dinoflagellate cyst with thin, but highly refractive autophragm, smooth with scattered granules. Outline elongated ovoidal, apically rounded to slightly pointed, antapically rounded. Tabulation partially apparent from faint sutures 5", 5-6a, 6", ?c, ?""", ?"""", Archeopyle 2A(3,4).

Remark: Normally no tabulation is apparent, except for the archeopyle outlined and accessory sutures. The faint cingulum is occasionally expressed. A hypotractal fold perpendicular to the long axis of the cyst is common. Length 27(20) µm; breadth 19(23)25 µm.