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Deflandrea intrasphaerula
Deflandrea intrasphaerula Mao Shaozhi and Norris, 1988
Holotype: Mao Shaozhi and Norris, 1988, pl.10, fig.4
Paratype: Mao Shaozhi and Norris, 1988
Locus typicus: Wuluokeqiate section, China
Stratum typicum: Early Oligocene
Original diagnosis: Mao Shaozhi and Norris, 1988, p. 43
Cyst proximate, circumbicavate, two lateral sides strongly convex. On one apical and two antapical sides, horns pointed and moderately developed. Ambital pericoel almost absent or very narrow because of relatively large and spherical endoblast filling most of pericoel. Archeopyle intercalary, type (I), broad hexa 2a; transverse AI 0.74 to 0.80 (holotype 0.75); operculum usually free.
Original description: Mao Shaozhi and Norris, 1988, p. 43
Cyst appearing plump, owing to large spherical endoblast occupying most of pericoel. Ambital pericoel very narrow (less than 4 µm wide) or completely absent. Apical horn bluntly pointed with broad base; two divergent antapical horns typically equal or slightly unequal, triangular in shape. Asymmetric appearance of two antapical horns resulting from specimens not being mounted in dorsoventral direction. Periphragm thin, smooth or finely granulate. Endophragm finely granulate to granulate. Cingulum, where present, indicated by faint low ridges. Sulcus broad, almost reaching the antapex.
Dimensions: Length 85 to 120 µm (holotype 117 µm), width 35 to 78 µm (holotype 76 µm).
Affinities:
Mao Shaozhi and Norris, 1988, p. 43: This species is characterized by a relatively large spherical endoblast that fills most of the pericoel. As a result, the cysts look plump, the ambital pericoels are very narrow (less than 4 µm wide) or even absent, and the antapical pericoel is also reduced. In these features, therefore, Deflandrea intrasphaerula differs from D. phosphoritica and D. oebisfeldensis.
Holotype: Mao Shaozhi and Norris, 1988, pl.10, fig.4
Paratype: Mao Shaozhi and Norris, 1988
Locus typicus: Wuluokeqiate section, China
Stratum typicum: Early Oligocene
Original diagnosis: Mao Shaozhi and Norris, 1988, p. 43
Cyst proximate, circumbicavate, two lateral sides strongly convex. On one apical and two antapical sides, horns pointed and moderately developed. Ambital pericoel almost absent or very narrow because of relatively large and spherical endoblast filling most of pericoel. Archeopyle intercalary, type (I), broad hexa 2a; transverse AI 0.74 to 0.80 (holotype 0.75); operculum usually free.
Original description: Mao Shaozhi and Norris, 1988, p. 43
Cyst appearing plump, owing to large spherical endoblast occupying most of pericoel. Ambital pericoel very narrow (less than 4 µm wide) or completely absent. Apical horn bluntly pointed with broad base; two divergent antapical horns typically equal or slightly unequal, triangular in shape. Asymmetric appearance of two antapical horns resulting from specimens not being mounted in dorsoventral direction. Periphragm thin, smooth or finely granulate. Endophragm finely granulate to granulate. Cingulum, where present, indicated by faint low ridges. Sulcus broad, almost reaching the antapex.
Dimensions: Length 85 to 120 µm (holotype 117 µm), width 35 to 78 µm (holotype 76 µm).
Affinities:
Mao Shaozhi and Norris, 1988, p. 43: This species is characterized by a relatively large spherical endoblast that fills most of the pericoel. As a result, the cysts look plump, the ambital pericoels are very narrow (less than 4 µm wide) or even absent, and the antapical pericoel is also reduced. In these features, therefore, Deflandrea intrasphaerula differs from D. phosphoritica and D. oebisfeldensis.