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Aldorfia dictyota ssp. papillata
Aldorfia dictyota ssp. papillata, (Gitmez, 1970), Jan du Chêne et al., 1986
Davies, 1983, raised this subspecies to the species level, as Scriniocassis papillata. In transferring the taxon to the genus Aldorfia, Jan du Chêne et al., 1986, retained it at the subspecies level. For the reason given under Aldorfia dictyota (Cookson and Eisenack, 1960) Davey, 1982, we follow Lentin and Williams, 1989 in retaining this taxon as a subspecies of Aldorfia dictyota, rather than retaining it as a subspecies of Scriniodinium dictyotum Cookson and Eisenack, 1960, as postulated by Brenner, 1988.
Holotype: Gitmez, 1970, pl.9, fig.11
Locus typicus: Clay from 20 ft. above the Ringstead Coral Bed, west of Osmington Mills, Dorset (OM 420), England
Stratum typicum: Early Kimmeridgian
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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.
Davies, 1983, raised this subspecies to the species level, as Scriniocassis papillata. In transferring the taxon to the genus Aldorfia, Jan du Chêne et al., 1986, retained it at the subspecies level. For the reason given under Aldorfia dictyota (Cookson and Eisenack, 1960) Davey, 1982, we follow Lentin and Williams, 1989 in retaining this taxon as a subspecies of Aldorfia dictyota, rather than retaining it as a subspecies of Scriniodinium dictyotum Cookson and Eisenack, 1960, as postulated by Brenner, 1988.
Holotype: Gitmez, 1970, pl.9, fig.11
Locus typicus: Clay from 20 ft. above the Ringstead Coral Bed, west of Osmington Mills, Dorset (OM 420), England
Stratum typicum: Early Kimmeridgian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.