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Kisselevia edwardsii
Kisselevia edwardsii (Wilson, 1967c, p.477, figs.8-9) Stover and Evitt, 1978, p.111.
NOW Piladinium. Originally Wetzeliella, subsequently Kisselevia, thirdly Charlesdowniea, fourthly (and now) Piladinium.
Holotype: Wilson, 1967c, fig.8.
Locus typicus: Waipawa, Hawkes Bay, New Zealand
Age: Early Eocene.
Original description: Wilson, 1967, p.477: Wetzeliella edwardsi
Periphragm outline rhomboidal with well developed horns at each angle. Single antapical horn usually displaced slightly to right of mid-ventral line; occasionally a very small bulge present indicating a left antapical horn. Ornament on periphragm restricted to margin, comprises processes (l=3-11 µm) Iinked distally by a membrane or filament. The largest processes occur midway between horns. Margin between horns concave. Archeopyle subrounded to nearly oval; operculum often located within capsule or within archeopyle. Capsule outline usually circular. No indication of tabulation. Transverse girdle indicated by distal notches on lateral horns.
Dimensions: Holotype: I = 96 µm, h = 107 µm, capsule 50 µm X 58 µm, apical horn 16 µm, antapical horn 19 µm, lateral horns 19 µm. Range (6 specimens): l=96(104) 121 µm, h=94(108)116 µm, capsule (l) 61 µm X 61 µm ap. h. 14(17)19 µm, ant. h. 16(19)22 µm, lat. h. 14(17)19 µm.
Affinities:
Wilson, 1967, p.477: Wetzeliella edwardsi
Wet. (W.) edwardsii is of the same general type as W. (W.) clathrata Eis. and W. (W.) coeleothrypta Williams and Downie, in that the processes are connected distally. It is readily distinguished from both species by having processes only at or near the margin. Other less obvious distinguishing features are the different periphragm outline, Iack of a true left antapical horn, and the very rounded archeopyle. At the type locality the species is associated with W. (W.) coleothrypta.
Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 469, pl.5,figs.1,2,4: Kisselovia cf. edwardsii
Bujak and Davies, 1983: Kisselovia edwardsii, pl. 11, fig. 7
This form differs from K. coleothrypta by the very short processes along parts of the ambitus, especially in the antapical region. It shows affinity with K. edwardsii in having a reduced number of processes mid-dorsally and mid-ventrally. The cyst-profile in dorso-ventral view may be almost circular.
NOW Piladinium. Originally Wetzeliella, subsequently Kisselevia, thirdly Charlesdowniea, fourthly (and now) Piladinium.
Holotype: Wilson, 1967c, fig.8.
Locus typicus: Waipawa, Hawkes Bay, New Zealand
Age: Early Eocene.
Original description: Wilson, 1967, p.477: Wetzeliella edwardsi
Periphragm outline rhomboidal with well developed horns at each angle. Single antapical horn usually displaced slightly to right of mid-ventral line; occasionally a very small bulge present indicating a left antapical horn. Ornament on periphragm restricted to margin, comprises processes (l=3-11 µm) Iinked distally by a membrane or filament. The largest processes occur midway between horns. Margin between horns concave. Archeopyle subrounded to nearly oval; operculum often located within capsule or within archeopyle. Capsule outline usually circular. No indication of tabulation. Transverse girdle indicated by distal notches on lateral horns.
Dimensions: Holotype: I = 96 µm, h = 107 µm, capsule 50 µm X 58 µm, apical horn 16 µm, antapical horn 19 µm, lateral horns 19 µm. Range (6 specimens): l=96(104) 121 µm, h=94(108)116 µm, capsule (l) 61 µm X 61 µm ap. h. 14(17)19 µm, ant. h. 16(19)22 µm, lat. h. 14(17)19 µm.
Affinities:
Wilson, 1967, p.477: Wetzeliella edwardsi
Wet. (W.) edwardsii is of the same general type as W. (W.) clathrata Eis. and W. (W.) coeleothrypta Williams and Downie, in that the processes are connected distally. It is readily distinguished from both species by having processes only at or near the margin. Other less obvious distinguishing features are the different periphragm outline, Iack of a true left antapical horn, and the very rounded archeopyle. At the type locality the species is associated with W. (W.) coleothrypta.
Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 469, pl.5,figs.1,2,4: Kisselovia cf. edwardsii
Bujak and Davies, 1983: Kisselovia edwardsii, pl. 11, fig. 7
This form differs from K. coleothrypta by the very short processes along parts of the ambitus, especially in the antapical region. It shows affinity with K. edwardsii in having a reduced number of processes mid-dorsally and mid-ventrally. The cyst-profile in dorso-ventral view may be almost circular.