Cordosphaeridium crassum, He Chengquan, 1991

He Chengquan, 1991, included this species in Cordosphaeridium subgen. Tarimocystium.

Holotype: He Chengquan, 1991, pl.14, fig.3
Location and stratigraphy: Wuqia county Basebulak; Wulagen fm.
Age: Middle Eocene

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Original description: [He Chengquan, 1991]: (translated by Suning Hou, 07-01-2019):

Description:
Body nearly circular, length slightly larger than width.
Wall thickness 3-5 μm, delamination is poor, the surface is fibrous- short wrinkled reticular.
Processes are mostly broken pipe shape, short, 2.5-7.5 μm long, 7.5 to 15 wide, the base and the end are a bit big, the wall has a fibrous structure, the cross-member of the process is not closed annular, the terminal is complete or irregular; The apex is small, an apical process is fuzzy; The antapical process is large and strong, 8-10 μm long, the central about 20 μm wide; Cingulum process is wide band. Its long axis is parallel to the equator, 5μm long, 15-18 μm wide. Process intratabular, one on each plate;
the tabulation is roughly 1', 6", 6c, 5-6'’', 1’’’'.
Archeopyle trapezoidal, precingular, formed by the movement of the third precingular plate. Operculum preserved in situ.

Dimensions:
The body length 85-87 μm, width 7 μm (measured 2); Holotype length 87 μm, width 75 μm.