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Cordosphaeridium brevitubulosum
Cordosphaeridium brevitubulosum, He Chengquan, 1991, p.166,214, pl.13, figs.9-12; text-fig.39.
He Chengquan (1991, p.165,213) designated this species as the "type species" of Cordosphaeridium subgenus Tarimocystium.
Holotype: He Chengquan, 1991, pl.13, fig.12; text-fig.39.
Location and stratigraphy: Wuqia county Basebulak; Wulagen fm
Age: Mid Eocene.
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Original description: [He Chengquan, 1991]: (translated by Suning Hou, 07-01-2019):
Description:
Cyst proximochorate, dorsal-ventral a bit flattened, the body contour ellipse - nearly circular.
Wall thickness 1-1.5 μm, two layers close to each other. The inner wall is smooth, the surface of the outer wall is short fibrous.
There are about 22 intratabular processes, one on each plate. Processes are mostly low cylindrical or truncated conical or carnivorous shape, formed by the outer wall, micro-fibrous structure. Their size is not exactly the same, distally open (except for the apical process); There may be 3 apical processes, small, conical, distally closed, or truncated cone, 4-5 μm long; Antapical processes are quite wide, cross-member round, diameter about 25 μm, 2-4 μm long, sometimes rubbed like a film; There are 6 cingulum processes, horizontal elongated flat shape.
The tabulation is roughly 3', 6", 6c, 5'", 1"".
Archeopyle outline trapezoidal, precingular, formed by the movement of the third precingular plate. Operculum completely separated, usually preserved in situ.
Dimensions:
Total length 77.5-88 μm, width 82.5-85 μm, body length 75-80 μm, width 61-85 μm (measured 4); Holotype total length 88 μm, width 82.5 μm, body length 80 μm, width 75 μm.
He Chengquan (1991, p.165,213) designated this species as the "type species" of Cordosphaeridium subgenus Tarimocystium.
Holotype: He Chengquan, 1991, pl.13, fig.12; text-fig.39.
Location and stratigraphy: Wuqia county Basebulak; Wulagen fm
Age: Mid Eocene.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [He Chengquan, 1991]: (translated by Suning Hou, 07-01-2019):
Description:
Cyst proximochorate, dorsal-ventral a bit flattened, the body contour ellipse - nearly circular.
Wall thickness 1-1.5 μm, two layers close to each other. The inner wall is smooth, the surface of the outer wall is short fibrous.
There are about 22 intratabular processes, one on each plate. Processes are mostly low cylindrical or truncated conical or carnivorous shape, formed by the outer wall, micro-fibrous structure. Their size is not exactly the same, distally open (except for the apical process); There may be 3 apical processes, small, conical, distally closed, or truncated cone, 4-5 μm long; Antapical processes are quite wide, cross-member round, diameter about 25 μm, 2-4 μm long, sometimes rubbed like a film; There are 6 cingulum processes, horizontal elongated flat shape.
The tabulation is roughly 3', 6", 6c, 5'", 1"".
Archeopyle outline trapezoidal, precingular, formed by the movement of the third precingular plate. Operculum completely separated, usually preserved in situ.
Dimensions:
Total length 77.5-88 μm, width 82.5-85 μm, body length 75-80 μm, width 61-85 μm (measured 4); Holotype total length 88 μm, width 82.5 μm, body length 80 μm, width 75 μm.