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Spiniferites sinuosus
From Fensome et al., 2019:
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Original description Morgenroth, 2008:
Derivation of name: Latin, sinuosus, fold, with reference co the folds on the shafts of the processes.
Holotype: Pl. 4, Figs 6, 7. Sample CP-26, single grain slide CP-26/7.
Paratypes: Single grain slides N-2/2, N-2/3 from sample N-2, single grain slide CP-25/71 from sample CP-25.
Type locality: Cipamingkis River, near Jonggol, West Java(fext-fig. 2). Cisubuh Formation, Late Miocene, Age N 17.
Diagnosis: An intermediate species of Spiniferites with a subspherical to ovoidal cyst and a tabulation pattern, which is well defined by membranous smooth ridges; the periphragm is smooth to faintly granular; processes are gonal, hollow, their stalks are smooth, but extensions of ridges may create folds on the shafts up to their distal ends; processes are predominantly foliate; the folia may have distally some small spines.
Description: The cysts of this.Spiniferites species are of medium size. They are ovoidal, sometimes spherical andd have usually a smooth, rarely a faintly granulated periphragm. Gonal processes arise from smooth membranous ridges, which delineate a gonyaulacalean field pattern. The processes have smooth stalks, which are hollow. Characteristically, from the ridges folds extend high onto the stalks of the processes and usually end at their distal termination: The processes are foliate and from the distal ends of the folia some small spines may arise. Almost all specimens show a simple precingular archeopyle (3'').
Dimensions: Length excluding processes, 40 (44) 47 μm, holotype 40 μm, width excluding processes, 35 (38) 45 μm, holotype 45 μm. Processes 9-17 μm, rarely 20 μm. 25 specimens measured.
Comparisons: The processes of Spiniferites sinuosus resemble those of Spiniferites pseudofurcatus (KLUMPP 1953) and Achomosphaera alcicornu (EISENACK 1954) Gocht 1969 however, both species are considerably larger than the new species (cysts ca. 60-70 μm). In addition, Achomosphaera alacornu has only vague indications of a field pattern. Spiniferites ovatus MATSUOKA 1983 is also larger than Spiniferites sinuosus and has variable processs, i.e. irregularly furcate, foliate or denticulate (MATSUOKA 1983: 134).
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Original description Morgenroth, 2008:
Derivation of name: Latin, sinuosus, fold, with reference co the folds on the shafts of the processes.
Holotype: Pl. 4, Figs 6, 7. Sample CP-26, single grain slide CP-26/7.
Paratypes: Single grain slides N-2/2, N-2/3 from sample N-2, single grain slide CP-25/71 from sample CP-25.
Type locality: Cipamingkis River, near Jonggol, West Java(fext-fig. 2). Cisubuh Formation, Late Miocene, Age N 17.
Diagnosis: An intermediate species of Spiniferites with a subspherical to ovoidal cyst and a tabulation pattern, which is well defined by membranous smooth ridges; the periphragm is smooth to faintly granular; processes are gonal, hollow, their stalks are smooth, but extensions of ridges may create folds on the shafts up to their distal ends; processes are predominantly foliate; the folia may have distally some small spines.
Description: The cysts of this.Spiniferites species are of medium size. They are ovoidal, sometimes spherical andd have usually a smooth, rarely a faintly granulated periphragm. Gonal processes arise from smooth membranous ridges, which delineate a gonyaulacalean field pattern. The processes have smooth stalks, which are hollow. Characteristically, from the ridges folds extend high onto the stalks of the processes and usually end at their distal termination: The processes are foliate and from the distal ends of the folia some small spines may arise. Almost all specimens show a simple precingular archeopyle (3'').
Dimensions: Length excluding processes, 40 (44) 47 μm, holotype 40 μm, width excluding processes, 35 (38) 45 μm, holotype 45 μm. Processes 9-17 μm, rarely 20 μm. 25 specimens measured.
Comparisons: The processes of Spiniferites sinuosus resemble those of Spiniferites pseudofurcatus (KLUMPP 1953) and Achomosphaera alcicornu (EISENACK 1954) Gocht 1969 however, both species are considerably larger than the new species (cysts ca. 60-70 μm). In addition, Achomosphaera alacornu has only vague indications of a field pattern. Spiniferites ovatus MATSUOKA 1983 is also larger than Spiniferites sinuosus and has variable processs, i.e. irregularly furcate, foliate or denticulate (MATSUOKA 1983: 134).