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Polysphaeridium subtile ssp. subtile
Polysphaeridium subtile ssp. subtile
Autonym. Now redundant.
Holotype:Davey and Williams 1966, pl.11, fig.1
Locus typicus: Sheppey, Kent, England
Stratum typicum: Ypresian
Original diagnosis: Davey and Williams, 1966, p. 92
Central body, sub-sphaerical to sub-retangular, with wall composed of extremely thin smooth endophragm and thin granular periphragm. Processes not in connection with interior, slender, open distally, with serrate margin. Average length of processes, one-fifth to one-third the diameter of central body. Number of processes greater than 60.
Original description: Davey and Williams, 1966, p. 92
Simple, slender, tubiform processes possessing a usually serrate distal margin. The latter is occasionally entire, and may be circular or oval. The width of the processes never exceeds 2 µm. The processes do not appear to be arranged in any regular pattern.
Emended diagnosis: Bujak in Bujak et al., 1980, p. 34
Chorate cysts with a subspherical to subrectangular central body. Endophragm
extremely thin and smooth; periphragm thin and granulate. Processes numerous (exceeding 60), slender, hollow, open distally with a serrate margin. Average process length is one-fifth to one-third of the central body diameter. Archaeopyle epicystal, type A+"3A"+6P. Opercular pieces may be partially or completely detached.
Autonym. Now redundant.
Holotype:Davey and Williams 1966, pl.11, fig.1
Locus typicus: Sheppey, Kent, England
Stratum typicum: Ypresian
Original diagnosis: Davey and Williams, 1966, p. 92
Central body, sub-sphaerical to sub-retangular, with wall composed of extremely thin smooth endophragm and thin granular periphragm. Processes not in connection with interior, slender, open distally, with serrate margin. Average length of processes, one-fifth to one-third the diameter of central body. Number of processes greater than 60.
Original description: Davey and Williams, 1966, p. 92
Simple, slender, tubiform processes possessing a usually serrate distal margin. The latter is occasionally entire, and may be circular or oval. The width of the processes never exceeds 2 µm. The processes do not appear to be arranged in any regular pattern.
Emended diagnosis: Bujak in Bujak et al., 1980, p. 34
Chorate cysts with a subspherical to subrectangular central body. Endophragm
extremely thin and smooth; periphragm thin and granulate. Processes numerous (exceeding 60), slender, hollow, open distally with a serrate margin. Average process length is one-fifth to one-third of the central body diameter. Archaeopyle epicystal, type A+"3A"+6P. Opercular pieces may be partially or completely detached.