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Thalassiphora microcysta
Thalassiphora microcysta Singh, 1983
Holotype: Singh, 1983, pl.56, fig.7
Locus typicus: Upper Shaftesbury Formation of the Peace River area
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 153
Proximate, camocavate cysts; endocyst small, ellipsoidal, thick walled, and dark; pericyst large, spheroidal to ellipsoidal and membranous; length of the endocyst less than 1/2 to 1/3 of the diameter of the pericyst; endophragm and periphragm dorsally appressed and separated elsewhere producing a large ventral pericoel; periphragm finely pitted, fibrous and with numerous, fine, convolute wrinkles on the surface; paracingulum expressed by a dark, transverse band below the archeopyle on the dorsal surface of some specimens; paratabulation and parasulcus not indicated; archeopyle precingular, type P (3" only); operculum free.
Size range: Diameter of the pericyst 110(129)144 Ám. Holotype 133 Ám. Length of the endocyst 48(56)65 Ám. Holotype 54 Ám. Breadth of the endocyst 36(42)48 Ám. Holotype 42 Ám. Specimens measured 10.
Affinities:
Singh, 1983, p. 154: Thalassiphora microcysta is characterized by a relatively small endocyst and a very large pericyst. The endocyst is dark, ellipsoidal and has a precingular, type P (3" only) archeopyle. Paracingulum is sometimes expressed by a dark, transverse band below the archeopyle. However, there is no other indication of paratabulation.
Holotype: Singh, 1983, pl.56, fig.7
Locus typicus: Upper Shaftesbury Formation of the Peace River area
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 153
Proximate, camocavate cysts; endocyst small, ellipsoidal, thick walled, and dark; pericyst large, spheroidal to ellipsoidal and membranous; length of the endocyst less than 1/2 to 1/3 of the diameter of the pericyst; endophragm and periphragm dorsally appressed and separated elsewhere producing a large ventral pericoel; periphragm finely pitted, fibrous and with numerous, fine, convolute wrinkles on the surface; paracingulum expressed by a dark, transverse band below the archeopyle on the dorsal surface of some specimens; paratabulation and parasulcus not indicated; archeopyle precingular, type P (3" only); operculum free.
Size range: Diameter of the pericyst 110(129)144 Ám. Holotype 133 Ám. Length of the endocyst 48(56)65 Ám. Holotype 54 Ám. Breadth of the endocyst 36(42)48 Ám. Holotype 42 Ám. Specimens measured 10.
Affinities:
Singh, 1983, p. 154: Thalassiphora microcysta is characterized by a relatively small endocyst and a very large pericyst. The endocyst is dark, ellipsoidal and has a precingular, type P (3" only) archeopyle. Paracingulum is sometimes expressed by a dark, transverse band below the archeopyle. However, there is no other indication of paratabulation.