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Aldorfia dictyota ssp. osmingtonensis
From Fensome et al., 2019:
Aldorfia dictyota ssp. osmingtonensis, (Gitmez, 1970, p.310–311, pl.1, fig.3; pl.8, fig.12) Jan du Chêne et al., 1986a, p.35.
Holotype: Gitmez, 1970, pl.8, fig.12; Jan du Chêne et al., 1986a, pl.7, figs.10–11.
NOW Scriniodinium dictyotum subsp. osmingtonense.
Originally (and now) Scriniodinium dictyotum subsp. osmingtonense, subsequently Scriniocassis dictyotus subsp. osmingtonensis, thirdly Aldorfia dictyota subsp. osmingtonensis.
Taxonomic senior synonym: Scriniocassis weberi, according to Davies (1983, p.24) — however, Jan du Chêne et al. (1986a, p.35) retained Aldorfia dictyota subsp. osmingtonensis.
Age: early Kimmeridgian.
Locus typicus: W of Osmington Mills, Dorset, England
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Original description as Scriniodinium dictyotum ssp. osmingtonense: [Gitmez, 1970, p. 311]:
Diagnosis:
Scriniodinium dictyotum without any prominence at the apex.
Description:
The shell is broadly ovate with an endoblast. There is no apical horn. Periblast irregularly reticulate. The cingulum is circular and equatorial. A large precingular archaeopyle is present on the dorsal side. 9 specimens were observed in the materials from Dorset with these structures.
Dimensions:
Holotype: overall length 90 µm, breadth 82 µm; endoblast length 80 µm, breadth 70 µm.
Range of the other specimens (6 specimens measured): overall length 75-90 µm, breadth 75-82 µm.
Aldorfia dictyota ssp. osmingtonensis, (Gitmez, 1970, p.310–311, pl.1, fig.3; pl.8, fig.12) Jan du Chêne et al., 1986a, p.35.
Holotype: Gitmez, 1970, pl.8, fig.12; Jan du Chêne et al., 1986a, pl.7, figs.10–11.
NOW Scriniodinium dictyotum subsp. osmingtonense.
Originally (and now) Scriniodinium dictyotum subsp. osmingtonense, subsequently Scriniocassis dictyotus subsp. osmingtonensis, thirdly Aldorfia dictyota subsp. osmingtonensis.
Taxonomic senior synonym: Scriniocassis weberi, according to Davies (1983, p.24) — however, Jan du Chêne et al. (1986a, p.35) retained Aldorfia dictyota subsp. osmingtonensis.
Age: early Kimmeridgian.
Locus typicus: W of Osmington Mills, Dorset, England
---------------------------------------------------------------------------------------------------
Original description as Scriniodinium dictyotum ssp. osmingtonense: [Gitmez, 1970, p. 311]:
Diagnosis:
Scriniodinium dictyotum without any prominence at the apex.
Description:
The shell is broadly ovate with an endoblast. There is no apical horn. Periblast irregularly reticulate. The cingulum is circular and equatorial. A large precingular archaeopyle is present on the dorsal side. 9 specimens were observed in the materials from Dorset with these structures.
Dimensions:
Holotype: overall length 90 µm, breadth 82 µm; endoblast length 80 µm, breadth 70 µm.
Range of the other specimens (6 specimens measured): overall length 75-90 µm, breadth 75-82 µm.