Back
Pareodinia rostrata
Pareodinia rostrata Yu Jingxian, 1982
Lentin in Lentin and Williams, 1989, after examining the holotype, concluded that it is of organic composition, but is not a dinoflagellate. Below, 1990 listed this species under "Nomina dubia", terming it palynodebris.
Holotype: Yu Jingxian, 1982, pl.1, fig.2
Age: Late Kimmeridgian-Berriasian
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.
Lentin in Lentin and Williams, 1989, after examining the holotype, concluded that it is of organic composition, but is not a dinoflagellate. Below, 1990 listed this species under "Nomina dubia", terming it palynodebris.
Holotype: Yu Jingxian, 1982, pl.1, fig.2
Age: Late Kimmeridgian-Berriasian
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.