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Trichodinium fusiforme
Trichodinium fusiforme He Chengquan, 1991
Holotype: He Chengquan, 1991, pl.21, fig.3
Age: Early Eocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: the cyst spindle shape. The apical horn is slender and resembles a large process with a length of 20 μm, a width of 4μm, the horn (mainly in the proximal pole) with several small protrusions or branches; The antapical horn is slightly shorter than the apical horn, length 17μm, base width 2.5μm, the end is expanded, lack of processes on the horn. The cingulum is rope-shaped and is located at the widest part of the cyst. No obvious sulcus displayed. Wall thin, with weak small processes, more or less fibrous, usually poorly separated from each other; The separated processes are bended stick shape, solid, 5μm long; The distribution of processes is not regular, usually dense-sparse inhomogeneously or locally lacking on the cyst side (may be associated with poorly preservation of the specimens); surfaces (including apical and antapical horns) except for processes granular-short winkled or rough. Archeopyle precingular, P-type, the outline near-square, formed by the loss of the third precingulr plate. Operculum shedding or sticking in situ. Overall length 105μm, width 60μm, body length 68μm, width 57μm.
Comparison: This species differs from Trichodinium hirsutum of the Australian Paleocene in that it is small in size, has weak short, unbranched processes.
Location and stratigraphy: Wuqia County, Basebulak; Qimugen fm, upper member.
Holotype: He Chengquan, 1991, pl.21, fig.3
Age: Early Eocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: the cyst spindle shape. The apical horn is slender and resembles a large process with a length of 20 μm, a width of 4μm, the horn (mainly in the proximal pole) with several small protrusions or branches; The antapical horn is slightly shorter than the apical horn, length 17μm, base width 2.5μm, the end is expanded, lack of processes on the horn. The cingulum is rope-shaped and is located at the widest part of the cyst. No obvious sulcus displayed. Wall thin, with weak small processes, more or less fibrous, usually poorly separated from each other; The separated processes are bended stick shape, solid, 5μm long; The distribution of processes is not regular, usually dense-sparse inhomogeneously or locally lacking on the cyst side (may be associated with poorly preservation of the specimens); surfaces (including apical and antapical horns) except for processes granular-short winkled or rough. Archeopyle precingular, P-type, the outline near-square, formed by the loss of the third precingulr plate. Operculum shedding or sticking in situ. Overall length 105μm, width 60μm, body length 68μm, width 57μm.
Comparison: This species differs from Trichodinium hirsutum of the Australian Paleocene in that it is small in size, has weak short, unbranched processes.
Location and stratigraphy: Wuqia County, Basebulak; Qimugen fm, upper member.