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Wetzeliella edwardsii
From Fensome et al., 2019:
Wetzeliella edwardsii Wilson, 1967
NOW Piladinium. Originally Wetzeliella, subsequently Kisselevia, thirdly Charlesdowniea, fourthly (and now) Piladinium.
Holotype: Wilson, 1967, fig.8
Locus typicus: Waipawa, Hawkes Bay, New Zealand
Stratum typicum: Early Eocene
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Original description: Wilson, 1967, p.477: Wetzeliella (Wetzeliella) edwardsii
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 (Wetzeliella) edwardsii
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.
Wetzeliella edwardsii Wilson, 1967
NOW Piladinium. Originally Wetzeliella, subsequently Kisselevia, thirdly Charlesdowniea, fourthly (and now) Piladinium.
Holotype: Wilson, 1967, fig.8
Locus typicus: Waipawa, Hawkes Bay, New Zealand
Stratum typicum: Early Eocene
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Original description: Wilson, 1967, p.477: Wetzeliella (Wetzeliella) edwardsii
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 (Wetzeliella) edwardsii
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.