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Pareodinia rostrata
From Fensome et al., 2019:
Pareodinia? rostrata Yu Jingxian, 1982, p.236, pl.1, figs.2–3. Holotype: Yu Jingxian, 1982, pl.1, fig.2. Originally Pareodinia, subsequently (and now) Pareodinia?. Questionable assignment: Lentin and Williams (1989, p.283); Below (1990, p.66) as a "nomen dubium". After examining the holotype, Lentin in Lentin and Williams (1989, p.283) concluded that this species is not a dinoflagellate. Age: late Kimmeridgian–Berriasian.
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Description: Compressed cysts irregularly elliptical. Wall thin. with punctate decoration. Apical horn clavate, 80 µm long, approximately 2/3 the length of cyst. End tapers to a point, appearing beak-shaped. Ventral section connected by fine, low ridges, perhaps equivalent to parasulcus. Intercalary archeopyle, typical type 31, large, quadrilateral.
Size: Cysts 95 - 100 µm long (not including apical horn) and 58 - 60 µm wide.
Comparison: This new species is distinguished from other species of the genus by the contraction of the apical horn into a beak shape and the linkage of the ventral section by fine, low ridges.
Pareodinia? rostrata Yu Jingxian, 1982, p.236, pl.1, figs.2–3. Holotype: Yu Jingxian, 1982, pl.1, fig.2. Originally Pareodinia, subsequently (and now) Pareodinia?. Questionable assignment: Lentin and Williams (1989, p.283); Below (1990, p.66) as a "nomen dubium". After examining the holotype, Lentin in Lentin and Williams (1989, p.283) concluded that this species is not a dinoflagellate. Age: late Kimmeridgian–Berriasian.
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Description: Compressed cysts irregularly elliptical. Wall thin. with punctate decoration. Apical horn clavate, 80 µm long, approximately 2/3 the length of cyst. End tapers to a point, appearing beak-shaped. Ventral section connected by fine, low ridges, perhaps equivalent to parasulcus. Intercalary archeopyle, typical type 31, large, quadrilateral.
Size: Cysts 95 - 100 µm long (not including apical horn) and 58 - 60 µm wide.
Comparison: This new species is distinguished from other species of the genus by the contraction of the apical horn into a beak shape and the linkage of the ventral section by fine, low ridges.