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Spiniferites ambiguus
From Fensome et al., 2019:
Spiniferites ambiguus (He Chengquan, 1991, p.135, pl.28, figs.7–8) Fensome et al., 2019a, p.55. Holotype: He Chengquan, 1991, pl.28, fig.7; Fensome et al., 2019a, fig.20D. Originally Cyclonephelium?, subsequently (and now) Spiniferites? Questionable assignment: Fensome et al. (2019a. p.55). Taxonomic junior synonym: Cyclonephelium? tarimense, according to Fensome et al. (2019a, p.p.55). Fensome et al. (2019a, p.55) recommended that this species be restricted to the holotype. Age: Paleocene.
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Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Oval body, length larger than width. Thin wall, the surface is smooth. Approximately two types of processes: One is a kind of big wide processes, flat and hollow, distally open, the ends with two duckbill-shaped branches or spines, the number of processes visible on different specimens varies, generally 2-4, length 15μm, the middle part width 5-6μm, they seem to be distributed only on the edge of the body; The other kind is small, not many, often at the edge of the body or on an annular ‘groove’near the edge, absent in the middle of the dorsal-ventral sides, their ends are simple or finger-branched, and the ends of the branches are simple. Two types of processes are brittle, easy to break. Archeopyle apical, (tA) type, formed by the movement of the apex, the edge is angular, diameter 38-47.5μm. Operculum preserved in situ, process absent on it. The body length 63μm, width 50-60μm (measured 2 ), the hootype length 62μm width 50μm.
Note: This type of specimens may belong to a new genus, which is currently in the genus under question.
Location and stratigraphy: Wuqia County Basebulak; Qimugen fm lower member.
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Comments Fensome et al., 2019a:
Although the morphologies of Cyclonephelium? ambiguum and Cyclonephelium? tarimense are unclear, they appear to us to be similar and questionably assignable to Spiniferites. We recommend that both names be restricted to their respective holotypes.
Stratigraphical occurrence. The type materials of both Spiniferites? ambiguus (as Cyclonephelium ambiguum) and Cyclonephelium? tarimense are from the Paleocene of China.
Spiniferites ambiguus (He Chengquan, 1991, p.135, pl.28, figs.7–8) Fensome et al., 2019a, p.55. Holotype: He Chengquan, 1991, pl.28, fig.7; Fensome et al., 2019a, fig.20D. Originally Cyclonephelium?, subsequently (and now) Spiniferites? Questionable assignment: Fensome et al. (2019a. p.55). Taxonomic junior synonym: Cyclonephelium? tarimense, according to Fensome et al. (2019a, p.p.55). Fensome et al. (2019a, p.55) recommended that this species be restricted to the holotype. Age: Paleocene.
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Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Oval body, length larger than width. Thin wall, the surface is smooth. Approximately two types of processes: One is a kind of big wide processes, flat and hollow, distally open, the ends with two duckbill-shaped branches or spines, the number of processes visible on different specimens varies, generally 2-4, length 15μm, the middle part width 5-6μm, they seem to be distributed only on the edge of the body; The other kind is small, not many, often at the edge of the body or on an annular ‘groove’near the edge, absent in the middle of the dorsal-ventral sides, their ends are simple or finger-branched, and the ends of the branches are simple. Two types of processes are brittle, easy to break. Archeopyle apical, (tA) type, formed by the movement of the apex, the edge is angular, diameter 38-47.5μm. Operculum preserved in situ, process absent on it. The body length 63μm, width 50-60μm (measured 2 ), the hootype length 62μm width 50μm.
Note: This type of specimens may belong to a new genus, which is currently in the genus under question.
Location and stratigraphy: Wuqia County Basebulak; Qimugen fm lower member.
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Comments Fensome et al., 2019a:
Although the morphologies of Cyclonephelium? ambiguum and Cyclonephelium? tarimense are unclear, they appear to us to be similar and questionably assignable to Spiniferites. We recommend that both names be restricted to their respective holotypes.
Stratigraphical occurrence. The type materials of both Spiniferites? ambiguus (as Cyclonephelium ambiguum) and Cyclonephelium? tarimense are from the Paleocene of China.