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Disphaeria sahnii
Disphaeria sahnii (Khanna and Singh, 1980) Sarkar and Singh, 1988
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) - however, Subathua sahnii is now considered a taxonomic junior synonym of Adnatosphaeridium (now Thalassiphora) patulum.
Khowaja-Ateequzzaman, 1991, correctly noted that this species name was a nomen nudum in Singh et al., 1979, and Khanna, 1979. Sarkar and Singh, 1988, provided a revised description for this species.
Holotype: Khanna and Singh, 1980, pl.1, fig.2
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 μ;overall diameter 100 x 91 μ; observed range; body diameter 48 x 44-73 x 72 μ; overall diameter 80 x 72-119 X 104 μ.
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) - however, Subathua sahnii is now considered a taxonomic junior synonym of Adnatosphaeridium (now Thalassiphora) patulum.
Khowaja-Ateequzzaman, 1991, correctly noted that this species name was a nomen nudum in Singh et al., 1979, and Khanna, 1979. Sarkar and Singh, 1988, provided a revised description for this species.
Holotype: Khanna and Singh, 1980, pl.1, fig.2
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 μ;overall diameter 100 x 91 μ; observed range; body diameter 48 x 44-73 x 72 μ; overall diameter 80 x 72-119 X 104 μ.
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.