From Fensome et al., 2019:
Cribroperidinium conopium Duxbury, 1983, p.43, pl.4, fig.11. Holotype: Duxbury, 1983, pl.4, fig.11; Jan du Chêne et al., 1986a, pl.21, figs.6–7. Age: early Albian.

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Original diagnosis: Duxbury, 1983, p. 43
A large, ovoidal, proximate dinoflagellate cyst species which possesses a long, distally tapering, blunt-ended apical horn. The entire surface, with the exception of the parasulcal depression, is covered by a coarse reticulum. Typically gonyaulacacean paratabulation is superimposed on the reticulum in the form of very low crests which may be distally denticulate. Accessory crests are present within paraplate areas. The archeopyle is formed by detachment of paraplate 3".
Observed Dimensions: Holotype - 133 x 90 Ám. Overall - 136 (128) 116 x 116 (96) 78 Ám.

Affinities:
Duxbury, 1983, p. 43: The surface reticulum demonstrated by this species sets it apart from all other species of the genus.