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Rhombodinium mirabile
Rhombodinium mirabile He Chengquan, 1991
Holotype: He Chengquan, 1991, pl.35, fig.7
Age: Middle Eocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: The cyst is dorsal-ventral flattened, contour pentagonal, length equals to width or width is greater than the length. Upper cyst triangular, with a nipple-shaped apical horn, length 10 -15μm, the top is decorated with a pair of small rings. The hypocyst is inverted trapezoid, the sides are nearly straight, the bottom can be slightly concave, lack of antapical horns. The size of both lateral horns varies, sometimes strong, trapezoidal, length 12.5μm, end concave; Sometimes very underdeveloped, only marked by a protrusion on the waist. The cingulum is clear on the lateral horns. The outer surface is granular or rough, particles dense and fine, slightly reflected on the contour line. The outline of the inner body is nearly circular, obvious or fuzzy, or a little convex into the lateral horns, the wall is thin, the surface is granular or smooth; It is obviously separated from the outer wall, except at the horns, the outer cavity is 2-3.5μm in width. Archeopyle clear, intercalary, the outline is circular square. Length nearly equals to width. The operculum has been separated, preserved in situ. Cyst length 95-112μm, width 94-120μm, body length 80-90μm, width 80-97.5μm (measured 3); Holotype length 112μm, width 120μm, inner body length 90μm, width 97.5μm, apical horn length 15μm, lateral horns length 12.5μm.
Location and stratigraphy: Wuqia County Basebulak, Shache County Altashi and Quruimu; Wulagen fm.
Holotype: He Chengquan, 1991, pl.35, fig.7
Age: Middle Eocene
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: The cyst is dorsal-ventral flattened, contour pentagonal, length equals to width or width is greater than the length. Upper cyst triangular, with a nipple-shaped apical horn, length 10 -15μm, the top is decorated with a pair of small rings. The hypocyst is inverted trapezoid, the sides are nearly straight, the bottom can be slightly concave, lack of antapical horns. The size of both lateral horns varies, sometimes strong, trapezoidal, length 12.5μm, end concave; Sometimes very underdeveloped, only marked by a protrusion on the waist. The cingulum is clear on the lateral horns. The outer surface is granular or rough, particles dense and fine, slightly reflected on the contour line. The outline of the inner body is nearly circular, obvious or fuzzy, or a little convex into the lateral horns, the wall is thin, the surface is granular or smooth; It is obviously separated from the outer wall, except at the horns, the outer cavity is 2-3.5μm in width. Archeopyle clear, intercalary, the outline is circular square. Length nearly equals to width. The operculum has been separated, preserved in situ. Cyst length 95-112μm, width 94-120μm, body length 80-90μm, width 80-97.5μm (measured 3); Holotype length 112μm, width 120μm, inner body length 90μm, width 97.5μm, apical horn length 15μm, lateral horns length 12.5μm.
Location and stratigraphy: Wuqia County Basebulak, Shache County Altashi and Quruimu; Wulagen fm.