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Spiniferella cornuta subsp. ovalis
Spiniferella cornuta subsp. ovalis (He Chengquan, 1991, p.151–152, pl.22, figs.1–2) Williams et al., 1998, p.566).
Originally Spiniferites cornutus subsp. ovalis, subsequently (and now) Spiniferella cornuta subsp. ovalis.
Holotype: He Chengquan, 1991, pl.22, figs.1–2.
Age: Paleocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Body nearly oval, the upper and lower cyst nearly equal, with a long apical horn, length 25-35 μm, Tapering and bending distally, with 2 branches in the middle, the end of 2 branches are bifurcated or simple, or simple. With tabulation and a large number of processes; The tabulation is marked by low smooth ridges as a boundary; Processes are generally distributed in the apex, antapex and cingulum area, they can be divided into two types: majority of processes coarse, hollow (?), distally trifurcated, such processes are located in the gonal positions of the precingular and postcingular plates; Few processes fine, distally bifurcated or simple, they are only in the cingulum and (or) antapex. The ends of the process branches have small furcations. There is a seam septa occasionally near the sulcus in the lower cyst, which has a row of thin and short processes, 6-7, length 10μm, the end is micro bifurcated (may be trifurcated). Cingulum narrow, width 4μm, equatorial position. Cyst wall thickness about 1 μm, surface fine granular, process surface smooth. Aecheopyle precingular, formed by the loss of the third precingular plate. Operculum free. Body length 50-57μm, width 47-50μm, process length 14-17 μm (measured 2); ,Holotype length 50μm, width 50μm, apical horn length 35 μm.
Loction and stratigraphy: Wuqia County, Basebulak; Qimugen fm, lower part of the lower member.
Originally Spiniferites cornutus subsp. ovalis, subsequently (and now) Spiniferella cornuta subsp. ovalis.
Holotype: He Chengquan, 1991, pl.22, figs.1–2.
Age: Paleocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Body nearly oval, the upper and lower cyst nearly equal, with a long apical horn, length 25-35 μm, Tapering and bending distally, with 2 branches in the middle, the end of 2 branches are bifurcated or simple, or simple. With tabulation and a large number of processes; The tabulation is marked by low smooth ridges as a boundary; Processes are generally distributed in the apex, antapex and cingulum area, they can be divided into two types: majority of processes coarse, hollow (?), distally trifurcated, such processes are located in the gonal positions of the precingular and postcingular plates; Few processes fine, distally bifurcated or simple, they are only in the cingulum and (or) antapex. The ends of the process branches have small furcations. There is a seam septa occasionally near the sulcus in the lower cyst, which has a row of thin and short processes, 6-7, length 10μm, the end is micro bifurcated (may be trifurcated). Cingulum narrow, width 4μm, equatorial position. Cyst wall thickness about 1 μm, surface fine granular, process surface smooth. Aecheopyle precingular, formed by the loss of the third precingular plate. Operculum free. Body length 50-57μm, width 47-50μm, process length 14-17 μm (measured 2); ,Holotype length 50μm, width 50μm, apical horn length 35 μm.
Loction and stratigraphy: Wuqia County, Basebulak; Qimugen fm, lower part of the lower member.