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Teneridinium lingulatum
Teneridinium Iingulatum He Chengquan, 1991
Holotype: He Chengquan, 1991, pl.2, fig.32
Age: Paleocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Narrow cyst, outline elongated pentagonal. The upper cyst is larger than the lower cyst, conical, lateral edges nearly straight, with a tongue-shaped apical horn, length 9.5 μm; Lower cyst inverted trapezoid, with two nearly equal large tongu-shaped antapical horns, length 5 μm. The cingulum deviates to the lower cyst, shallow concave, ring form, width 5 μm, its edge decorated with a row of particles. Sulcus not found. The wall is thin and consists of two layers. The outer wall surface with coarse particles and granular fine ridges, the body has some longitudinal fine ridges, the relationship between these ridges and the plates is still not sure. The outline of the inner body is close to the cyst, its wall is slightly thicker than the outer wall, no significant surface ornamentation; The inner body is close attached to the outer wall except at the horns. Archeopyle unknown. Cyst length 57μm, width 32; inner body length 42 μm, width 31 μm.
Comparison: This cyst is different from other species of the genus by small and narrow and long cyst, more obvious cingulum.
Location and stratigraphy: SUlugqat County Basebulak, lower Qimugen fm.
Holotype: He Chengquan, 1991, pl.2, fig.32
Age: Paleocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Narrow cyst, outline elongated pentagonal. The upper cyst is larger than the lower cyst, conical, lateral edges nearly straight, with a tongue-shaped apical horn, length 9.5 μm; Lower cyst inverted trapezoid, with two nearly equal large tongu-shaped antapical horns, length 5 μm. The cingulum deviates to the lower cyst, shallow concave, ring form, width 5 μm, its edge decorated with a row of particles. Sulcus not found. The wall is thin and consists of two layers. The outer wall surface with coarse particles and granular fine ridges, the body has some longitudinal fine ridges, the relationship between these ridges and the plates is still not sure. The outline of the inner body is close to the cyst, its wall is slightly thicker than the outer wall, no significant surface ornamentation; The inner body is close attached to the outer wall except at the horns. Archeopyle unknown. Cyst length 57μm, width 32; inner body length 42 μm, width 31 μm.
Comparison: This cyst is different from other species of the genus by small and narrow and long cyst, more obvious cingulum.
Location and stratigraphy: SUlugqat County Basebulak, lower Qimugen fm.