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Spiniferites cijarianus
From Fensome et al., 2019:
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Original description Morgenroth, 2008:
Derivation of name: The species is named after the Cijarian River, West Java, where it has been found in the section studied.
Holotype: Pl.3, Figs1, 2, 3, SampleN-11, single grain slide N-11/3
Paratypes: single grain slides N-11/2. N-11/4. N-11/5. N-11/8, sample N-11
Type locality: Cijarian River, West Java (text-Fig. 5). Cimandiri Formation, middle Miocene, Age N13.
Diagnosis: A to small to intermediate species of Spiniferites with the following combined characteristics: cyst subsphaerical to ovoidal, tabulation is weakly defined Spiniferites by low membranous ridges. The periphragm is granular, processes are gonal, smooth to faintly striate, trifurcate or bifid, their distal branches often bifurcate. At their base, some of the processes may be connected by slightly higher ridges.
Description: This Spiniferites species has small to medium sized cysts. The cysts are usually spherical, sometimes slightly ovoidal, and have usually a faintly granulated periphragm. Gonal processes arise from low membranous ridges which delineate a gonyaulacalean field pattern. However, the ridges are not always discernable, in these cases the field pattern is difficult to define. The processes have smooth to faintly striate shafts, which seem to be hollow at their base, and are distally trifurcate or bifid. The ends of their branches are usually bifurcate. Some processes may be joined at their base by higher ridges. Almost all specimens show a simple precingular archeopyle (3").
Dimensions: Length excluding processes, 29 (34) 40 µm, holotype 32 µm, width excluding processes, 25 (29) 32 µm, holotype 32 µm. Processes 9一12 µm, rarely 15 µm. 50 specimens measured.
Comparisons: The new species resembles Spiniferites asperulus MATSUOKA 1983 from the Late Miocene/Early Pleistocene of Japan. However, S. asperulus is larger and has longer, sometimes intergonal, processes with granular stalks (MATSUOKA 1983: 131-132). Spiniferites firmus MATSUOKA 1983 described from the Early Pleistocene of Japan is also larger, has a finely granular endophragm and longer processes (16- 23 µm) (MATSUOKA 1983: 134). Spiniferites bulloideum DEFLANDRE and COOKSON 1955 from the Australian Miocene has the same dimensions, however, it has the general appearance of Spiniferites furcatus and S. ramosus and trifurcate processes only (DEFLANDRE & COOKSON, 1955: 264).
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Original description Morgenroth, 2008:
Derivation of name: The species is named after the Cijarian River, West Java, where it has been found in the section studied.
Holotype: Pl.3, Figs1, 2, 3, SampleN-11, single grain slide N-11/3
Paratypes: single grain slides N-11/2. N-11/4. N-11/5. N-11/8, sample N-11
Type locality: Cijarian River, West Java (text-Fig. 5). Cimandiri Formation, middle Miocene, Age N13.
Diagnosis: A to small to intermediate species of Spiniferites with the following combined characteristics: cyst subsphaerical to ovoidal, tabulation is weakly defined Spiniferites by low membranous ridges. The periphragm is granular, processes are gonal, smooth to faintly striate, trifurcate or bifid, their distal branches often bifurcate. At their base, some of the processes may be connected by slightly higher ridges.
Description: This Spiniferites species has small to medium sized cysts. The cysts are usually spherical, sometimes slightly ovoidal, and have usually a faintly granulated periphragm. Gonal processes arise from low membranous ridges which delineate a gonyaulacalean field pattern. However, the ridges are not always discernable, in these cases the field pattern is difficult to define. The processes have smooth to faintly striate shafts, which seem to be hollow at their base, and are distally trifurcate or bifid. The ends of their branches are usually bifurcate. Some processes may be joined at their base by higher ridges. Almost all specimens show a simple precingular archeopyle (3").
Dimensions: Length excluding processes, 29 (34) 40 µm, holotype 32 µm, width excluding processes, 25 (29) 32 µm, holotype 32 µm. Processes 9一12 µm, rarely 15 µm. 50 specimens measured.
Comparisons: The new species resembles Spiniferites asperulus MATSUOKA 1983 from the Late Miocene/Early Pleistocene of Japan. However, S. asperulus is larger and has longer, sometimes intergonal, processes with granular stalks (MATSUOKA 1983: 131-132). Spiniferites firmus MATSUOKA 1983 described from the Early Pleistocene of Japan is also larger, has a finely granular endophragm and longer processes (16- 23 µm) (MATSUOKA 1983: 134). Spiniferites bulloideum DEFLANDRE and COOKSON 1955 from the Australian Miocene has the same dimensions, however, it has the general appearance of Spiniferites furcatus and S. ramosus and trifurcate processes only (DEFLANDRE & COOKSON, 1955: 264).