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Thalassiphora simlaensis
Thalassiphora simlaensis Lentin and Williams, 1993 nom. subst. pro Thalassiphora spinosa (Khanna and Singh, 1980) Stover and Williams, 1987 non Thalassiphora spinosa (Clarke and Verdier, 1967) Foucher, 1975.
Originally Subathua spinosa, subsequently Thalassiphora spinosa (combination illegitimate), thirdly (and now) Thalassiphora simlaensis.
Substitute name for Thalassiphora spinosa (Khanna and Singh, 1980, p.309, pl.1, figs.10–12; text-fig.3) Stover and Williams, 1987, p.207 (an illegitimate name).
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Lentin and Williams (1985, p.340) — however, Stover and Williams (1987, p.207) retained Thalassiphora simlaensis (as Thalassiphora spinosa).
Nomenclatural junior synonym: Muratodinium subathuensis, since in proposing this species Sarkar (2012, p.174) included the holotype of Thalassiphora simlaensis (=Subathua spinosa) in synonymy with Muratodinium subathuensis.
Holotype: Khanna and Singh, 1980, pl.1, fig.10
Age: Eocene
Original description (Khanna and Singh, 1980)
Holotype - Pl. l, fig. 10, slide no. 5865.
Type Locality - Jabli, Subathu Formation, Simla Hills.
Diagnosis - Cyst cavate, central body spherical to oval with apical and/or antapical and/or lateral horn or horns or protuberance; periphragm forming parachutelike wing lamella covering the body ventrally;
archaeopyle precingular.
Description - Cyst cavate; usually dorsoventrally :flattened; endophragm smooth or granulose forming spherical to oval body with apical and/or antapical and/or lateral horn/horns or protuberance; periphragmal
strands arising either from the lateral or laterodorsal region, ramifying, inturning, uniting and forming a parachute-like coarse to fine reticulate wing lamella covering the body ventrally; reflected tabulation not evident; cingulum forming a raised ridge; archaeopyle quadrate, precingular. Dimensions - Holotype; diameter of cyst body 72 x 59 μ.; overall diameter 91 x 82 μ.; observed range; diameter or cyst body
56 x 47-72x59 μ.; overall diameter 85x75-91 x 82 μ..
Comparison - Subathua spinosa sp. nov. closely resembles Subathua sahnii sp. nov. but can be distinguished by the presence of apical and/or antapical and/or lateral horn or horns or protuberance on the central body.
Remarks - Though plate tabulation pattern is not completely evident in the present species, thickenings in the periphragm in some specimens indicate plate areas. A distinct pericoel is present on the ventral surface.
Occurrence - Middle Eocene.
Originally Subathua spinosa, subsequently Thalassiphora spinosa (combination illegitimate), thirdly (and now) Thalassiphora simlaensis.
Substitute name for Thalassiphora spinosa (Khanna and Singh, 1980, p.309, pl.1, figs.10–12; text-fig.3) Stover and Williams, 1987, p.207 (an illegitimate name).
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Lentin and Williams (1985, p.340) — however, Stover and Williams (1987, p.207) retained Thalassiphora simlaensis (as Thalassiphora spinosa).
Nomenclatural junior synonym: Muratodinium subathuensis, since in proposing this species Sarkar (2012, p.174) included the holotype of Thalassiphora simlaensis (=Subathua spinosa) in synonymy with Muratodinium subathuensis.
Holotype: Khanna and Singh, 1980, pl.1, fig.10
Age: Eocene
Original description (Khanna and Singh, 1980)
Holotype - Pl. l, fig. 10, slide no. 5865.
Type Locality - Jabli, Subathu Formation, Simla Hills.
Diagnosis - Cyst cavate, central body spherical to oval with apical and/or antapical and/or lateral horn or horns or protuberance; periphragm forming parachutelike wing lamella covering the body ventrally;
archaeopyle precingular.
Description - Cyst cavate; usually dorsoventrally :flattened; endophragm smooth or granulose forming spherical to oval body with apical and/or antapical and/or lateral horn/horns or protuberance; periphragmal
strands arising either from the lateral or laterodorsal region, ramifying, inturning, uniting and forming a parachute-like coarse to fine reticulate wing lamella covering the body ventrally; reflected tabulation not evident; cingulum forming a raised ridge; archaeopyle quadrate, precingular. Dimensions - Holotype; diameter of cyst body 72 x 59 μ.; overall diameter 91 x 82 μ.; observed range; diameter or cyst body
56 x 47-72x59 μ.; overall diameter 85x75-91 x 82 μ..
Comparison - Subathua spinosa sp. nov. closely resembles Subathua sahnii sp. nov. but can be distinguished by the presence of apical and/or antapical and/or lateral horn or horns or protuberance on the central body.
Remarks - Though plate tabulation pattern is not completely evident in the present species, thickenings in the periphragm in some specimens indicate plate areas. A distinct pericoel is present on the ventral surface.
Occurrence - Middle Eocene.