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Gymnodinium longicorne
Gymnodinium longicorne Vozzhennikova 1967; Emendation: Lentin and Vozzhennikova, 1990, p.18-19, as Dinogymnium longicorne.
Now Dinogymnium. Originally Gymnodinium, subsequently (and now) Dinogymnium.
Tax. sr. synonym of Dinogymnium (originally Gymnodinium) curuatum (Vozzhennikova, 1967) Lentin and Williams, 1973, according to Lentin and Vozzhennikova, 1990.
Holotype: Vozzhennikova, 1967, pl.1, fig.8; Lentin and Vozzhennikova, 1990, pl.2, figs.1-2, text-fig.5a
Locus typicus: Yuzhno-Kopachevk area, W Siberia
Stratum typicum: Senonian
Translation Vozzhennikova, 1967: Lees in Sarjeant (Ed.) 1971
Original description: Vozzhennilova, 1967, p. 67
Theca spindle-shaped, strongly elongated. Epitheca conical, rounded at the apical end and considerably larger than hypotheca. Hypotheca funnel-shaped; at a certain distance from the transverse furrow it tappers sharply or gradually to form a tubular antapical projection with is bluntly rounded at the end. Transverse furrow deep, slightly spiral. Longitudinal furrow slit-like and extending on to the epitheca. Theca smooth or pitted. The surface of the thecal envelope has ribbing which runs from the transverse furrow to the poles.
Dimensions: holotype - length 74.7 Ám, breadth 21.58 Ám, length of epitheca 21.58 Ám, length of hypotheca 46.48 Ám, width of transverse furrow 3.5 Ám, width of antapical outgrowth 8.35 Ám. The other examples have a length 62-64 Ám, a breadth 21-28 Ám, length of epitheca 18.4-27 Ám, length of hypotheca 43.7-46 Ám, width of transverse furrow 2.5-5 Ám, width of antapical end 4.6-8 Ám.
Affinities:
Vozzhennikova, 1967, p. 67: This species has some general similarity to G. curvatum from which it differs in the absence of any curvature to its hypotheca.
Now Dinogymnium. Originally Gymnodinium, subsequently (and now) Dinogymnium.
Tax. sr. synonym of Dinogymnium (originally Gymnodinium) curuatum (Vozzhennikova, 1967) Lentin and Williams, 1973, according to Lentin and Vozzhennikova, 1990.
Holotype: Vozzhennikova, 1967, pl.1, fig.8; Lentin and Vozzhennikova, 1990, pl.2, figs.1-2, text-fig.5a
Locus typicus: Yuzhno-Kopachevk area, W Siberia
Stratum typicum: Senonian
Translation Vozzhennikova, 1967: Lees in Sarjeant (Ed.) 1971
Original description: Vozzhennilova, 1967, p. 67
Theca spindle-shaped, strongly elongated. Epitheca conical, rounded at the apical end and considerably larger than hypotheca. Hypotheca funnel-shaped; at a certain distance from the transverse furrow it tappers sharply or gradually to form a tubular antapical projection with is bluntly rounded at the end. Transverse furrow deep, slightly spiral. Longitudinal furrow slit-like and extending on to the epitheca. Theca smooth or pitted. The surface of the thecal envelope has ribbing which runs from the transverse furrow to the poles.
Dimensions: holotype - length 74.7 Ám, breadth 21.58 Ám, length of epitheca 21.58 Ám, length of hypotheca 46.48 Ám, width of transverse furrow 3.5 Ám, width of antapical outgrowth 8.35 Ám. The other examples have a length 62-64 Ám, a breadth 21-28 Ám, length of epitheca 18.4-27 Ám, length of hypotheca 43.7-46 Ám, width of transverse furrow 2.5-5 Ám, width of antapical end 4.6-8 Ám.
Affinities:
Vozzhennikova, 1967, p. 67: This species has some general similarity to G. curvatum from which it differs in the absence of any curvature to its hypotheca.