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Impletosphaeridium xinjiangense
Impletosphaeridium xinjiangense (Lentin and Williams, 1993, p.117) Williams et al., 1998, p.336.
Originally Cleistosphaeridium elegans (name illegitimate), subsequently Cleistosphaeridium xinjiangense, thirdly (and now) Impletosphaeridium xinjiangense.
Holotype: He Chengquan, 1991, pl.24, fig.5.
Age: Paleocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Small body, outline nearly circular. Wall is thin, transparent, layers unclear, smooth surface. There are a lot of non-tabular thin processes (about 25), the shape is more consistent, solid, firm, width consistent or tapering distally, the distal end with 4 branches (For example the holotype) or a trifurcated; Branches weak spiny, up to 5 μm, end pointed; Individual processes end simple,, perhaps related to the breakage of its distal part. Acheopyle apical, tA type, formed by the absence of theapex, the edge angular. Operculum free.
The total diameter 47.5 -50 μm, the body diameter of 30-34 μm, the process length of 10-15 μm (measured 2); the total diameter of the holotype 47.5 μm, the body diameter about 30μm, process length 10 μm.
Comparison: The new species differs from Cleistosphaeridium tribuliferum in its nearly circular outline, shorter and solid processes, the latter’s were long and hollow.
Location and stratigraphy: Wuqia County Bashibulac; Qimugen fm, the lower member.
Originally Cleistosphaeridium elegans (name illegitimate), subsequently Cleistosphaeridium xinjiangense, thirdly (and now) Impletosphaeridium xinjiangense.
Holotype: He Chengquan, 1991, pl.24, fig.5.
Age: Paleocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Small body, outline nearly circular. Wall is thin, transparent, layers unclear, smooth surface. There are a lot of non-tabular thin processes (about 25), the shape is more consistent, solid, firm, width consistent or tapering distally, the distal end with 4 branches (For example the holotype) or a trifurcated; Branches weak spiny, up to 5 μm, end pointed; Individual processes end simple,, perhaps related to the breakage of its distal part. Acheopyle apical, tA type, formed by the absence of theapex, the edge angular. Operculum free.
The total diameter 47.5 -50 μm, the body diameter of 30-34 μm, the process length of 10-15 μm (measured 2); the total diameter of the holotype 47.5 μm, the body diameter about 30μm, process length 10 μm.
Comparison: The new species differs from Cleistosphaeridium tribuliferum in its nearly circular outline, shorter and solid processes, the latter’s were long and hollow.
Location and stratigraphy: Wuqia County Bashibulac; Qimugen fm, the lower member.