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Pareodinia elongata
From Fensome et al., 2019:
Pareodinia elongata YYu Jingxian, 1982, p.236–237, pl.1, figs.6–7. Holotype: Yu Jingxian, 1982, pl.1, fig.6. After examining the holotype, Lentin in Lentin and Williams (1989, p.282) concluded that this species is not a dinoflagellate. Age: Late Jurassic–Early Cretaceous.
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Description: Proximate cysts, long elliptical in outline, their length being 2 - 3 times their width. Periphragm only, 0.5 - 1 µm thick. Surface smooth or finely punctate. One elongate apical horn, exceeding length of cyst; tubular; hollow center; end shows widening. Apical pore elliptical. Intercalary archeopyle frequently fails to show.
Size: Cysts 60.2 - 80 µm long and 25 - 30 µm wide.
Comparison: This new species is distinguished from other species in the genus by its conspicuously elongated apical horn.
Pareodinia elongata YYu Jingxian, 1982, p.236–237, pl.1, figs.6–7. Holotype: Yu Jingxian, 1982, pl.1, fig.6. After examining the holotype, Lentin in Lentin and Williams (1989, p.282) concluded that this species is not a dinoflagellate. Age: Late Jurassic–Early Cretaceous.
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Description: Proximate cysts, long elliptical in outline, their length being 2 - 3 times their width. Periphragm only, 0.5 - 1 µm thick. Surface smooth or finely punctate. One elongate apical horn, exceeding length of cyst; tubular; hollow center; end shows widening. Apical pore elliptical. Intercalary archeopyle frequently fails to show.
Size: Cysts 60.2 - 80 µm long and 25 - 30 µm wide.
Comparison: This new species is distinguished from other species in the genus by its conspicuously elongated apical horn.