From Fensome et al., 2019:
Aldorfia dictyota ssp. papillata, (Gitmez, 1970, p.311, pl.9, fig.11) Jan du Chêne et al., 1986a, p.35.
Holotype: Gitmez, 1970, pl.9, fig.11.
NOW Scriniodinium dictyotum subsp. papillatum.
Originally (and now) Scriniodinium dictyotum subsp. papillatum, subsequently Scriniocassis dictyotus subsp. papillatus, thirdly Scriniocassis papillatus, fourthly Aldorfia dictyota subsp. papillata.
Age: early Kimmeridgian.

Locus typicus: Clay from 20 ft. above the Ringstead Coral Bed, west of Osmington Mills, Dorset (OM 420), England

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Original description as Scriniodinium dictyotum ssp. papillatum: [Gitmez, 1970, p. 311]:

Diagnosis:
Scriniodinium dictyotum characterized by its blunt, mamelonshaped apical prominence. The endophragm has the same shape as the periphragm.

Description:
The shell is broadly ovoidal in shape, terminating in a mamelon form. The surface of the periphragm is irregularly reticulate.

Dimensions:
Holotype: overall length 88 µm, breadth 70 µm.
Range (2 specimens measured): overall length 86-90 µm, breadth 65-85 µm.