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Senoniasphaera lordii
Senoniasphaera lordii (Cookson and Eisenack, 1968) Lentin and Williams, 1976
Now Senoniasphaera. Originally Ascodinium, subsequently (and now) Senoniasphaera.
Holotype: Cookson and Eisenack, 1968, fig.1J
Paratype: Cookson and Eisenack, 1968
Locus typicus: Perth Basin, Gingin Brook silty limestone at 202-204 ft.
Stratum typicum: Santonian-early Campanian
Original diagnosis: Cookson and Eisenack, 1968, p.112: Ascodinium lordii
Shell longer than broad with slightly convex sides and three well defined horns. The apical as well as the two antapical horns are short, broadly based and somewhat triangular in outline with convex sides and rounded apices. The internal capsule is oval in shape and almost fills the shell laterally, but does not extend into the horns. In the equatorial region of the capsule a light, straight-sided strip, c. 4 µm wide, which extends to its lateral limits, has usually been evident in the stained specimen used in this investigation. The wall of the shell is thin and more or less granular. The wall of the capsule is somewhat thicker and smooth, except near the margins where, in most specimens, a more or less coarse, somewhat finely reticulate pattern is in evidence. The shell opens by the detachment of the whole apex along a straight or zig-zag line suggestive of tabulation.
Dimensions: Holotype - length c. 90 µm, overall width 77 µm, width of capsule c. 62 µm. Complete paratypes overall length c. 106-120 µm, overall width 68-80 µm; opened shell c. 74-95 µm long.
Now Senoniasphaera. Originally Ascodinium, subsequently (and now) Senoniasphaera.
Holotype: Cookson and Eisenack, 1968, fig.1J
Paratype: Cookson and Eisenack, 1968
Locus typicus: Perth Basin, Gingin Brook silty limestone at 202-204 ft.
Stratum typicum: Santonian-early Campanian
Original diagnosis: Cookson and Eisenack, 1968, p.112: Ascodinium lordii
Shell longer than broad with slightly convex sides and three well defined horns. The apical as well as the two antapical horns are short, broadly based and somewhat triangular in outline with convex sides and rounded apices. The internal capsule is oval in shape and almost fills the shell laterally, but does not extend into the horns. In the equatorial region of the capsule a light, straight-sided strip, c. 4 µm wide, which extends to its lateral limits, has usually been evident in the stained specimen used in this investigation. The wall of the shell is thin and more or less granular. The wall of the capsule is somewhat thicker and smooth, except near the margins where, in most specimens, a more or less coarse, somewhat finely reticulate pattern is in evidence. The shell opens by the detachment of the whole apex along a straight or zig-zag line suggestive of tabulation.
Dimensions: Holotype - length c. 90 µm, overall width 77 µm, width of capsule c. 62 µm. Complete paratypes overall length c. 106-120 µm, overall width 68-80 µm; opened shell c. 74-95 µm long.