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Pareodinia minima
From Fensome et al., 2019:
Pareodinia minima Yu Jingxian, 1982, p.237, pl.1, figs.9–10,19. Holotype: Yu Jingxian, 1982, pl.1, fig.9. Originally Pareodinia, subsequently (and now) Pareodinia?. Questionable assignment: Lentin in Lentin and Williams (1989, p.282); Below (1990, p.66) as a "nomen dubium". Lentin in Lentin and Williams (1989, p.282), after examining the holotype, concluded that this species is not a dinoflagellate. Age: late Kimmeridgian–Berriasian.
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Description: Cysts small, elliptical in outline. Periphragm only, approximately 1 µm thick. Surface has punctate ornamentation. Apical horn short, about 1/3 the length of cyst, clavate. End has an apical pore that connects with outer furrow. Parasuture low and flat, showing only at paracingulum. Intercalary archeopyle is typical type 31, large, polygonal.
Size: Cysts have total length of 38 - 39.1 µm and are 20 - 20.7 µm wide.
Comparison: This new species resembles P. minuta Wiggins (1975) in the size of its individuals but is differentiated from it by its larger apical horn and its typical type-3I intercalary archeopyle.
Pareodinia minima Yu Jingxian, 1982, p.237, pl.1, figs.9–10,19. Holotype: Yu Jingxian, 1982, pl.1, fig.9. Originally Pareodinia, subsequently (and now) Pareodinia?. Questionable assignment: Lentin in Lentin and Williams (1989, p.282); Below (1990, p.66) as a "nomen dubium". Lentin in Lentin and Williams (1989, p.282), after examining the holotype, concluded that this species is not a dinoflagellate. Age: late Kimmeridgian–Berriasian.
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Description: Cysts small, elliptical in outline. Periphragm only, approximately 1 µm thick. Surface has punctate ornamentation. Apical horn short, about 1/3 the length of cyst, clavate. End has an apical pore that connects with outer furrow. Parasuture low and flat, showing only at paracingulum. Intercalary archeopyle is typical type 31, large, polygonal.
Size: Cysts have total length of 38 - 39.1 µm and are 20 - 20.7 µm wide.
Comparison: This new species resembles P. minuta Wiggins (1975) in the size of its individuals but is differentiated from it by its larger apical horn and its typical type-3I intercalary archeopyle.