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Bosedinia infragranulata
From Fensome et al., 2019:
Bosedinia infragranulata He Chengquan, 1984b, p.174, pl.6, figs.17–23. Holotype: He Chengquan, 1984b, pl.6, fig.17. Age:
Late Oligocene–Early Miocene.
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Original description: [He Chengquan, 1984b] (translated from Chinese with Google):
Bosedinia infragranulata (sp. nov.)
(Plate VI, Figures 17-23)
Description: The shell is subcircular to triangular in shape. The shell wall is of medium thickness (0.8-1.5 microns), divided into two layers of nearly equal thickness or with unclear delamination. Surface ornamentation is generally weakly granular or endogranular, except for the operculum, which is sometimes distinctly granular. The outline (especially at the tail) is generally smooth; some specimens have a rough surface. The palate may have been epiphyseal, with nearly straight or curved outlines. A V-shaped fissure may be visible on either side. The operculum is connected.
The shell diameter is 50-60 μm; the holotype is 58 μm in diameter.
This species is quite similar to Bosedinia (al. Palaeostomocystis) scabrata (Jiabo, Early Tertiary Dinophytes and Apophyses of the Bohai Coastal Area, p. 127, plate 32, figs. 24, 25), but differs in that the ornamentation is an internal granular structure.
Origin: Shangsi, Guangxi; Yongning Group.
Bosedinia infragranulata He Chengquan, 1984b, p.174, pl.6, figs.17–23. Holotype: He Chengquan, 1984b, pl.6, fig.17. Age:
Late Oligocene–Early Miocene.
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Original description: [He Chengquan, 1984b] (translated from Chinese with Google):
Bosedinia infragranulata (sp. nov.)
(Plate VI, Figures 17-23)
Description: The shell is subcircular to triangular in shape. The shell wall is of medium thickness (0.8-1.5 microns), divided into two layers of nearly equal thickness or with unclear delamination. Surface ornamentation is generally weakly granular or endogranular, except for the operculum, which is sometimes distinctly granular. The outline (especially at the tail) is generally smooth; some specimens have a rough surface. The palate may have been epiphyseal, with nearly straight or curved outlines. A V-shaped fissure may be visible on either side. The operculum is connected.
The shell diameter is 50-60 μm; the holotype is 58 μm in diameter.
This species is quite similar to Bosedinia (al. Palaeostomocystis) scabrata (Jiabo, Early Tertiary Dinophytes and Apophyses of the Bohai Coastal Area, p. 127, plate 32, figs. 24, 25), but differs in that the ornamentation is an internal granular structure.
Origin: Shangsi, Guangxi; Yongning Group.