Back
Cribroperidinium perforans ssp. kunzeviense
From Fensome et al., 2019:
Cribroperidinium? perforans ssp. kunzeviense (Vozzhennikova, 1967, p.87, pl.27, fig.6; pl.30, fig.2; pl.33, fig.6) Lentin and Williams, 1989, p.83. Holotype: Vozzhennikova, 1967, pl.30, fig.2, lost according to Lentin and Vozzhennikova (1990, p.94). Originally Gonyaulax perforans var. kunzeviensis (Appendix B), subsequently
Gonyaulacysta kunzeviensis, thirdly Gonyaulacysta perforans var. kunzeviensis (combination not validly
published), fourthly (and now) Cribroperidinium? perforans subsp. kunzeviense. According to Lentin and
Vozzhennikova (1990, p.94), no potential lectotype is available. Age: Valanginian.
---------------------------------------------------------------------------------------------------
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990
Original description: Vozzhennikova, 1967, p.87: Gonyaulax perforans ssp. kunzeviense
Theca ovoid, divided into two almost equal parts. Epitheca conical with a horn. Transverse furrow twisted to the left, its ends separated by a distance corresponding to 1-1.5 times the width of the furrow. Longitudinal furrow extends toward the antapex. Arrangement of plates: as for the species (see plate 30, fig.1). margin of transverse furrow bordered by a narrow, smooth, lenticular projection. The same light projection are present along the sutures of the plates; the projections on the hypotheca expanding in width towards the antapex where they fuse as a broad outgrowth surrounding the antapex. Tbe projections on the epitheca are narrower although their width does increase somewhat at the angles where the plates join. Those of the apical plates extend on to the apical horn and, continuing along this structure, extent its length slightly.
Size: Holotype, length 107 µm, width 70 µm width of paracingulum about 5 µm; length of apical horn with its process 23 µm without its process 11 µm, width of process to the antapex 8 µm.
Cribroperidinium? perforans ssp. kunzeviense (Vozzhennikova, 1967, p.87, pl.27, fig.6; pl.30, fig.2; pl.33, fig.6) Lentin and Williams, 1989, p.83. Holotype: Vozzhennikova, 1967, pl.30, fig.2, lost according to Lentin and Vozzhennikova (1990, p.94). Originally Gonyaulax perforans var. kunzeviensis (Appendix B), subsequently
Gonyaulacysta kunzeviensis, thirdly Gonyaulacysta perforans var. kunzeviensis (combination not validly
published), fourthly (and now) Cribroperidinium? perforans subsp. kunzeviense. According to Lentin and
Vozzhennikova (1990, p.94), no potential lectotype is available. Age: Valanginian.
---------------------------------------------------------------------------------------------------
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990
Original description: Vozzhennikova, 1967, p.87: Gonyaulax perforans ssp. kunzeviense
Theca ovoid, divided into two almost equal parts. Epitheca conical with a horn. Transverse furrow twisted to the left, its ends separated by a distance corresponding to 1-1.5 times the width of the furrow. Longitudinal furrow extends toward the antapex. Arrangement of plates: as for the species (see plate 30, fig.1). margin of transverse furrow bordered by a narrow, smooth, lenticular projection. The same light projection are present along the sutures of the plates; the projections on the hypotheca expanding in width towards the antapex where they fuse as a broad outgrowth surrounding the antapex. Tbe projections on the epitheca are narrower although their width does increase somewhat at the angles where the plates join. Those of the apical plates extend on to the apical horn and, continuing along this structure, extent its length slightly.
Size: Holotype, length 107 µm, width 70 µm width of paracingulum about 5 µm; length of apical horn with its process 23 µm without its process 11 µm, width of process to the antapex 8 µm.