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Xenicodinium suturospinosum
Xenicodinium suturispinosum, He Chengquan, 1991; Lentin and Williams, 1993
Originally Stomodinium, subsequently (and now) Xenicodinium.
Holotype: He Chengquan, 1991, pl.13, fig.8
Age: Early Eocene
Type location: Wuqia County Basebulak; Qimugen fm, the bottom of the upper member.
Original Description: He Chengquan, 1991: translated by Suning Hou, 07-01-2019
Description:
cyst is nearly circular, length and width nearly equal. Wall thickness about 1 μm, surface with short wrinkle decoration and sparse small processes; The former type of decoration can cause fine reticulates locally; processes are mostly spines, strong, straight or curved, base slightly wide, the ends pointed, 3-7μm long, distributed along the sutures, there is a row of processes on the suture, the distance between each other about 7.5μm; A few processes are slender, usually 10-15μm long, solid, distally with 3-4 pole branches, with enlarged or intercalated ends cauliflower-like, which may be located on the gonal positions or cingulum. archeopyle precingular, outline like a horseshoe. The operculum is attached in situ; There is a row of processes in the middle of the operculum, it may imply that the operculum is made of two plates
Dimensions:
Cyst (Excluding process and operculum) Length 75μm, width 72μm.
Comparison: This new species differs from Stomodinium crassum in a thinner wall, only one row of strong processes on the sutures.
Originally Stomodinium, subsequently (and now) Xenicodinium.
Holotype: He Chengquan, 1991, pl.13, fig.8
Age: Early Eocene
Type location: Wuqia County Basebulak; Qimugen fm, the bottom of the upper member.
Original Description: He Chengquan, 1991: translated by Suning Hou, 07-01-2019
Description:
cyst is nearly circular, length and width nearly equal. Wall thickness about 1 μm, surface with short wrinkle decoration and sparse small processes; The former type of decoration can cause fine reticulates locally; processes are mostly spines, strong, straight or curved, base slightly wide, the ends pointed, 3-7μm long, distributed along the sutures, there is a row of processes on the suture, the distance between each other about 7.5μm; A few processes are slender, usually 10-15μm long, solid, distally with 3-4 pole branches, with enlarged or intercalated ends cauliflower-like, which may be located on the gonal positions or cingulum. archeopyle precingular, outline like a horseshoe. The operculum is attached in situ; There is a row of processes in the middle of the operculum, it may imply that the operculum is made of two plates
Dimensions:
Cyst (Excluding process and operculum) Length 75μm, width 72μm.
Comparison: This new species differs from Stomodinium crassum in a thinner wall, only one row of strong processes on the sutures.