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Subathua sahnii
Subathua "*sahnii" Khanna and Singh, 1980, p.308–309, pl.1, figs.1–3,5–9; text-figs.1–2. Emendation: Sarkar and Singh, 1988, p.41, as Disphaeria sahnii.
Originally Subathua, subsequently Disphaeria. Taxonomic senior synonym: Adnatosphaeridium (as and now Thalassiphora) patulum, according to Stover and Williams (1987, p.207) and Lentin and Williams (1989, p.354).
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Lentin and Williams (1985, p.340). This name was not validly published in Singh et al. (1979, p.35–36,46: caption to pl.2, fig.4) and Khanna (1979, p.217) since no description was provided.
Holotype: Khanna and Singh, 1980, pl.1, fig.2; Fensome et al., 1995, fig.2 — p.1759.
Age: Eocene.
Original description (Khanna and Singh, 1980)
Holotype - Pl. l, fig. 2, slide no. 5865. Type Locality - Jabli, Subathu Formation, Simla Hills.
Diagnosis - Cyst cavate, central body spherical to oval, smooth or granulose, without horns, periphragm forming parachute-like lamellar wing covering the body ventrally; archaeopyle precingular, quadrate.
Description - Cyst cavate, endophragm forming spherical to oval body; body without horns; periphragmal strands arising from the lateral or latero-dorsal region, ramifying, uniting, forming a parachutelike fine to coarse reticulate wing lamella covering the body ventrally; archaeopyle precingular, reflected tabulation not evident; cingulum forming a raised ridge; a keel may be present.
Dimensions - Holotype; body diameter 65 x 58 μm;overall diameter 100 x 91 μm; observed range; body diameter 48 x 44-73 x 72 μm; overall diameter 80 x 72-119 X 104 μm.
Remarks - Specimens have been found showing linear thickenings or folds in the periphragm indicating plate areas. When the specimens are laterally pressed, a distinct pericoel is seen between the endophragm
and periphragm.
Occurrence - Lower-Upper Eocene.
Originally Subathua, subsequently Disphaeria. Taxonomic senior synonym: Adnatosphaeridium (as and now Thalassiphora) patulum, according to Stover and Williams (1987, p.207) and Lentin and Williams (1989, p.354).
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Lentin and Williams (1985, p.340). This name was not validly published in Singh et al. (1979, p.35–36,46: caption to pl.2, fig.4) and Khanna (1979, p.217) since no description was provided.
Holotype: Khanna and Singh, 1980, pl.1, fig.2; Fensome et al., 1995, fig.2 — p.1759.
Age: Eocene.
Original description (Khanna and Singh, 1980)
Holotype - Pl. l, fig. 2, slide no. 5865. Type Locality - Jabli, Subathu Formation, Simla Hills.
Diagnosis - Cyst cavate, central body spherical to oval, smooth or granulose, without horns, periphragm forming parachute-like lamellar wing covering the body ventrally; archaeopyle precingular, quadrate.
Description - Cyst cavate, endophragm forming spherical to oval body; body without horns; periphragmal strands arising from the lateral or latero-dorsal region, ramifying, uniting, forming a parachutelike fine to coarse reticulate wing lamella covering the body ventrally; archaeopyle precingular, reflected tabulation not evident; cingulum forming a raised ridge; a keel may be present.
Dimensions - Holotype; body diameter 65 x 58 μm;overall diameter 100 x 91 μm; observed range; body diameter 48 x 44-73 x 72 μm; overall diameter 80 x 72-119 X 104 μm.
Remarks - Specimens have been found showing linear thickenings or folds in the periphragm indicating plate areas. When the specimens are laterally pressed, a distinct pericoel is seen between the endophragm
and periphragm.
Occurrence - Lower-Upper Eocene.