Cleistosphaeridium digitale, He Chengquan, 1991

Holotype: He Chengquan, 1991, pl.25, fig.14
Location and stratigraphy: Wuqia county Basebulak, Qimugen fm, at the bottom of the upper member.
Age: Early Eocene

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

Description:
The outline of the body is nearly circular or ellipse.
Wall thin, about 1 μm thick, two layers or not clear, the outer wall surface fine granular, some of the particles connected into short wrinkles. With a large number of non-tabular processes, more than 30, thin (1-2.5 μm wide), straight or curved, solid or only the wide base slightly hollow, their lengths are concomitant; Shape of the processes variable, some are like hand, distally expanded and with 3-6 branches; Branches often straight, a few bent backwards or extending laterally; Some spiny, end simple; Some strip, ends simple or head like or bifurcated; Usually mainly hand-shaped and strip-shaped process, the ratio varies in different specimens; Process surface smooth, occasionally a little perforated.
Archeopyle apical, (tA) type, the edge angular. Operculum sheded or in-situ preserved.

Dimensions:
The body length 60-78μm, width 48-65μm, process length 20-30μm (measured 3); Holotype length 60μm, width 65μm, the process length 25 μm, width 1-2μm.