Carpatella scabrota, (He Chengquan, 1991), Lentin and Williams, 1993

Holotype: He Chengquan, 1991, pl.8, fig.14
Location and stratigraphy: Wuqia County Basebulak; Qimugen fm lower member.
Age: Paleocene

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

Description:
Cyst dorsal-ventral flattened, body contour nearly circular. There is an apical and antapical horn, papillary, end smooth. The base is connected to the cyst; The apical horn is slightly smaller than the antapical horn, length 3.5 μm, tail length 5 μm.
There is no sulcus, cingulum or inner body.
Cyst wall thickness about 1 μm, two layers close to each other. The surface has dense particles and short wrinkles, looks quite rough.
Archeopyle obvious, the outline nearly square, precingular, P-type, formed by the movement of the third precingular plate. Operculum preserved in-situ.

Dimensions:
Cyst length 72.5 μm, width 65 μm.

Affinities:
This species differs from Paraireiana sinensis in the absence of bridged ridges on the wall surface.