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Tanyosphaeridium salpinx
Tanyosphaeridium salpinx Norvick, 1976 in Norvick and Burger, 1976
Holotype: Norvick, 1976, pl.9, fig.10; Fauconnier and Masure, 2004, pl.79, figs.6–8.
Locus typicus: Bathurst Island no. 2 well, Australia; core 6, 126. 5 m
Stratum typicum: Cenomanian
Original diagnosis: Norvick, 1976, p.63
Cyst chorate, central body elongate. Processes intratabular, one per plate area and up to 30 in number. Sulcal processes slightly smaller than the others. Process terminations open, flared, and entire. Central body wall thin, sparsely granulate. Reflected tabulation formula 4", 6", 6c, 6""", ?1p, 1-4"""", 1-3s. Archaeopyle apical, tetratabular, with a notched margin.
Description: Norvick, 1976, p.63-64
Chorate cyst, with a markedly elongate central body and up to 30 slender processes. The processes are intratabular in position, arranged one per plate area and reflect a tabulation formula 4", 6", 6c, 6""", ?1p, 1-4"""" and 1-3s. All major whorls have similar sized processes but the variable number of sulcal processes are slightly smaller. The major processes are hollow, smooth, distally open, and form a circle where they leave the central body. Over most of their length they are cylindrical (1-2 µm wide) or become slightly narrower. Distally they expand to an open trumpet-shaped termination, having an entire or finely serrate margin. The central body is sometimes sparsely granulate but it is uncertain whether the periphragm or the endophragm bears this ornament. The two membranes are very thin and are usually under 0.5 µm in total thickness. The archaeopyle is apical in position, jagged or notched in outline, and is probably formed by the loss of four reflected plate areas.
Dimensions: The overall length varies from 37 to 51 µm with an average of 43 µm for 10 measured specimens.
Holotype: Norvick, 1976, pl.9, fig.10; Fauconnier and Masure, 2004, pl.79, figs.6–8.
Locus typicus: Bathurst Island no. 2 well, Australia; core 6, 126. 5 m
Stratum typicum: Cenomanian
Original diagnosis: Norvick, 1976, p.63
Cyst chorate, central body elongate. Processes intratabular, one per plate area and up to 30 in number. Sulcal processes slightly smaller than the others. Process terminations open, flared, and entire. Central body wall thin, sparsely granulate. Reflected tabulation formula 4", 6", 6c, 6""", ?1p, 1-4"""", 1-3s. Archaeopyle apical, tetratabular, with a notched margin.
Description: Norvick, 1976, p.63-64
Chorate cyst, with a markedly elongate central body and up to 30 slender processes. The processes are intratabular in position, arranged one per plate area and reflect a tabulation formula 4", 6", 6c, 6""", ?1p, 1-4"""" and 1-3s. All major whorls have similar sized processes but the variable number of sulcal processes are slightly smaller. The major processes are hollow, smooth, distally open, and form a circle where they leave the central body. Over most of their length they are cylindrical (1-2 µm wide) or become slightly narrower. Distally they expand to an open trumpet-shaped termination, having an entire or finely serrate margin. The central body is sometimes sparsely granulate but it is uncertain whether the periphragm or the endophragm bears this ornament. The two membranes are very thin and are usually under 0.5 µm in total thickness. The archaeopyle is apical in position, jagged or notched in outline, and is probably formed by the loss of four reflected plate areas.
Dimensions: The overall length varies from 37 to 51 µm with an average of 43 µm for 10 measured specimens.