Back
Pseudokomewuia laevigata ssp. laevigata
Pseodokomewuia laevigata ssp. Iaevigata
Autonym.
Holotype: He Chengquan, 1980, pl.1, fig.1.
Age: Oligocene.
Description: He Chengquan 1980, p. 2-3
Body almost circular, outline of shell fusiform with one apical and one antapical horn of nearly equal or unequal size (the former larger), at their free ends blunt or somewhat pointed, surface of the horns smooth to granular; the apical horn coniform, length 1-12.5 µm (mostly 6-12.5µm) width at base 2.5-8µm; length of the antapical horn 2.5-8µm (often 3-6µm), width at base 5-10 µm. wall thin (1-1.5µm) and two layers hard to distinguish, surface smooth, often with one or two transverse folds at equatorial area, which may be a reflection of the cingulum, and sometimes showing irregular secondary folds. Inner body completely fills the pericoel, Endophragm is close to the periphragm, deviating only at the bases of the apical and antapical horns. Archeopyle, if present, apical, formed by the removal (or the rupture) of an apical region. Operculum attached. All specimens always contain yellow-green nucleus-like bodies within shell.
Dimensions Holotype 72µm long, 52.5µm wide; apical horn 7.5µm long, base 7µm wide; antapical horn 8.5µm long, base 10µm wide; inner body 54µm long, 52µm wide. Paratype (Fig.4) 65µm long, 54µm wide; inner body 45µm long, 52µm wide; (Fig.5) 58µm long, 57µm wide; inner body 50µm long, 55µm wide; Range. 40-72µm long, 40-57µm wide, inner body 35-54µm long, 37-55µm wide. Measured 29 specimens.
Comparison: This new species differs from other ones of the subgenus in having a smooth periphragm.
Occurrence The Second member (Oligocene) of Yongning Group; Shangsi County, Guangxi.
Autonym.
Holotype: He Chengquan, 1980, pl.1, fig.1.
Age: Oligocene.
Description: He Chengquan 1980, p. 2-3
Body almost circular, outline of shell fusiform with one apical and one antapical horn of nearly equal or unequal size (the former larger), at their free ends blunt or somewhat pointed, surface of the horns smooth to granular; the apical horn coniform, length 1-12.5 µm (mostly 6-12.5µm) width at base 2.5-8µm; length of the antapical horn 2.5-8µm (often 3-6µm), width at base 5-10 µm. wall thin (1-1.5µm) and two layers hard to distinguish, surface smooth, often with one or two transverse folds at equatorial area, which may be a reflection of the cingulum, and sometimes showing irregular secondary folds. Inner body completely fills the pericoel, Endophragm is close to the periphragm, deviating only at the bases of the apical and antapical horns. Archeopyle, if present, apical, formed by the removal (or the rupture) of an apical region. Operculum attached. All specimens always contain yellow-green nucleus-like bodies within shell.
Dimensions Holotype 72µm long, 52.5µm wide; apical horn 7.5µm long, base 7µm wide; antapical horn 8.5µm long, base 10µm wide; inner body 54µm long, 52µm wide. Paratype (Fig.4) 65µm long, 54µm wide; inner body 45µm long, 52µm wide; (Fig.5) 58µm long, 57µm wide; inner body 50µm long, 55µm wide; Range. 40-72µm long, 40-57µm wide, inner body 35-54µm long, 37-55µm wide. Measured 29 specimens.
Comparison: This new species differs from other ones of the subgenus in having a smooth periphragm.
Occurrence The Second member (Oligocene) of Yongning Group; Shangsi County, Guangxi.