Polysphaeridium trompetum Cookson and Eisenack, 1982

Now Cordosphaeridium?. Originally Polysphaeridium, subsequently (and now) Cordosphaeridium?.

Holotype: Cookson and Eisenack, 1982, pl. 4, fig. 22
Age: Paleocene
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Original description: [Cookson and Eisenack, 1982] (translated from German):

Polysphaeridium trompetum n. sp.
Plate 4, Fig. 22

Type: The specimen shown on Plate 4, Fig. 22 and preserved in specimen Rivernook 26.
Diagnosis: Almost spherical in shape, with numerous short, funnel-shaped, evenly distributed appendages. The appendages are very thin-walled and have fine longitudinal striations in the lower cylindrical part, which diverge into the upper, expanded part.
A rather large opening could be an archaeopyle, but this is doubtful.
Material and dimensions: One specimen. Diameter of the spherical shell approx. 81 x 76 μ, length of the appendages approx. 10-14 μ, width of the funnel-shaped opening up to approx. 10 μ.
Occurrence: Rivernook Bed.