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Scriniocassis dictyotus ssp. osmingtonensis
Scriniocassis dictyotum ssp. osmingtonense (Gitmez, 1970) Lentin and Williams, 1975
NOW Scriniodinium dictyotum subsp. osmingtonense. Originally (and now) Scriniodinium dictyotum subsp. osmingtonense, subsequently Scriniocassis dictyota 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 Scriniocassis dictyotus subsp. osmingtonensis (as Aldorfia dictyota subsp. osmingtonensis).
Holotype: Gitmez, 1970, pl.8, fig.12; Jan du Chêne et al., 1986, pl.7, figs.10-11
Locus typicus: Shaly clay from Liostrea delta Bed, west of Osmington Mills, Dorset (OM 131), England
Stratum typicum: Early Kimmeridgian
Original diagnosis: Gitmez, 1970, p.311: Scriniodinium dictyotum ssp. osmingtonense
Scriniodinium dictyotum without any prominence at the apex.
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.
Original description: Gitmez, 1970, p.311: Scriniodinium dictyotum ssp. osmingtonense
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.
NOW Scriniodinium dictyotum subsp. osmingtonense. Originally (and now) Scriniodinium dictyotum subsp. osmingtonense, subsequently Scriniocassis dictyota 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 Scriniocassis dictyotus subsp. osmingtonensis (as Aldorfia dictyota subsp. osmingtonensis).
Holotype: Gitmez, 1970, pl.8, fig.12; Jan du Chêne et al., 1986, pl.7, figs.10-11
Locus typicus: Shaly clay from Liostrea delta Bed, west of Osmington Mills, Dorset (OM 131), England
Stratum typicum: Early Kimmeridgian
Original diagnosis: Gitmez, 1970, p.311: Scriniodinium dictyotum ssp. osmingtonense
Scriniodinium dictyotum without any prominence at the apex.
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.
Original description: Gitmez, 1970, p.311: Scriniodinium dictyotum ssp. osmingtonense
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.