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Cleistosphaeridium xinjiangense
From Fensome et al., 2019:
Cleistosphaeridium xinjiangense Lentin and Williams, 1993, p.117. Holotype: He Chengquan, 1991, pl.24, fig.5. NOW
Impletosphaeridium xinjiangense. Originally Cleistosphaeridium elegans He Chengquan (name illegitimate),
subsequently Cleistosphaeridium xinjiangense, thirdly (and now) Impletosphaeridium xinjiangense. Substitute name for Cleistosphaeridium elegans He Chengquan, 1991, p.141–142, pl.24, figs.5–6; text-fig.27 (an illegitimate
name). Age: Paleocene.
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Original description: [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 the apex, the edge angular. Operculum free.
Dimensions:
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.
Affinities:
The new species differs from Cleistosphaeridium tribuliferum in its nearly circular outline, shorter and solid processes, the latter’s were long and hollow.
Cleistosphaeridium xinjiangense Lentin and Williams, 1993, p.117. Holotype: He Chengquan, 1991, pl.24, fig.5. NOW
Impletosphaeridium xinjiangense. Originally Cleistosphaeridium elegans He Chengquan (name illegitimate),
subsequently Cleistosphaeridium xinjiangense, thirdly (and now) Impletosphaeridium xinjiangense. Substitute name for Cleistosphaeridium elegans He Chengquan, 1991, p.141–142, pl.24, figs.5–6; text-fig.27 (an illegitimate
name). Age: Paleocene.
---------------------------------------------------------------------------------------------------
Original description: [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 the apex, the edge angular. Operculum free.
Dimensions:
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.
Affinities:
The new species differs from Cleistosphaeridium tribuliferum in its nearly circular outline, shorter and solid processes, the latter’s were long and hollow.