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Gonyaulax decapitata
Gonyaulax decapitata W. Wetzel, 1967; Emendation: Sarjeant, 1980b, p.121, as Meiourogonyaulax decapitata.
Originally Gonyaulax, subsequently Meiourogonyaulax, thirdly Lithodinia, fourthly Meiourogonyaulax?Sarjeant, 1982, retained Meiourogonyaulax decapitata as a separate species.
Taxonomic senior synonym: Meiourogonyaulax (as Lithodinia) valensii Sarjeant, 1966b, according to Fenton (1981, p.253) and Williams et al. (1993, p.56).
Holotype: W. Wetzel, 1967, pl.16, figs.7a-b; Sarjeant, 1980, pl.3, figs.1-3, text-fig.3
Age: Bajocian
Translation Wetzel, 1967: LPP
Original description: Wetzel, 1967, p. 869
Diagnosis: A species of the genus Gonyaulax with the following tabulation scheme: number of apical plates unknown (apical calotte shed), 6"", 6""", p, ppl, 1"""". The laevorotatory girdle furrow is offset; its ends are displaced one girdle width. The narrow longitudinal furrow shows a differentiated closing-plate. Along the plate boundaries considerably high hollow membranous folds rise. There is an blister-like envelope below the antapical pole.
Dimension: longitudinal diameter 66 µm. 2 specimens found.
Originally Gonyaulax, subsequently Meiourogonyaulax, thirdly Lithodinia, fourthly Meiourogonyaulax?Sarjeant, 1982, retained Meiourogonyaulax decapitata as a separate species.
Taxonomic senior synonym: Meiourogonyaulax (as Lithodinia) valensii Sarjeant, 1966b, according to Fenton (1981, p.253) and Williams et al. (1993, p.56).
Holotype: W. Wetzel, 1967, pl.16, figs.7a-b; Sarjeant, 1980, pl.3, figs.1-3, text-fig.3
Age: Bajocian
Translation Wetzel, 1967: LPP
Original description: Wetzel, 1967, p. 869
Diagnosis: A species of the genus Gonyaulax with the following tabulation scheme: number of apical plates unknown (apical calotte shed), 6"", 6""", p, ppl, 1"""". The laevorotatory girdle furrow is offset; its ends are displaced one girdle width. The narrow longitudinal furrow shows a differentiated closing-plate. Along the plate boundaries considerably high hollow membranous folds rise. There is an blister-like envelope below the antapical pole.
Dimension: longitudinal diameter 66 µm. 2 specimens found.