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Lingulodinium polyedra
From Fensome et al., 2019:
Lingulodinium polyedra (Stein, 1883, p.13, pl.4, figs.7–9) Dodge, 1989, p.291. Holotype: not designated. Originally Gonyaulax (Appendix B), subsequently (and now) Lingulodinium. This species name was originally proposed for the motile stage of a living dinoflagellate; its cyst equivalent is Lingulodinium machaerophorum. NIA. Age: extant.
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Original description: [Stein, 1883] (translated form German):
Only later did I discover in a second species from Kiel ascidians, Gonyaulax polyedra St. (Plate IV, Fig. 7 9), as well as in many specimens of Gonyaulax spinfera observed in Heligoland (Fig. 12), the composition of the carapace, marked only by slightly prominent sutures. It consists of five basal plates (b, b) and three frontal plates (f, f) on the proboscis, and also of five basal plates (p, p) on the posterior abdomen, but only of two end plates (cf. Fig. 8, 9, e, e), one of which (e) participates in the formation of the abdominal wall. According to this, the genus Gonyaulax, despite great differences in habit, is closely related to the genus Goniodoma.
Lingulodinium polyedra (Stein, 1883, p.13, pl.4, figs.7–9) Dodge, 1989, p.291. Holotype: not designated. Originally Gonyaulax (Appendix B), subsequently (and now) Lingulodinium. This species name was originally proposed for the motile stage of a living dinoflagellate; its cyst equivalent is Lingulodinium machaerophorum. NIA. Age: extant.
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Original description: [Stein, 1883] (translated form German):
Only later did I discover in a second species from Kiel ascidians, Gonyaulax polyedra St. (Plate IV, Fig. 7 9), as well as in many specimens of Gonyaulax spinfera observed in Heligoland (Fig. 12), the composition of the carapace, marked only by slightly prominent sutures. It consists of five basal plates (b, b) and three frontal plates (f, f) on the proboscis, and also of five basal plates (p, p) on the posterior abdomen, but only of two end plates (cf. Fig. 8, 9, e, e), one of which (e) participates in the formation of the abdominal wall. According to this, the genus Gonyaulax, despite great differences in habit, is closely related to the genus Goniodoma.