1992 Dendrospyris (?) sakaii - Sugiyama and Furutani p.205; pl. 13, figs. 3, 6; pl. 20, figs: 3-4c
From Suzuki Paleotax db:
1992 Dendrospyris (?) sakaii n. sp. Sugiyama & Furutani p. 204-205, pl. 13, figs. 3, 6, pl. 20, figs. 3-4c
Catalog entries: Dendrospyris sakaii
Original description: Cephalis clearly two-lobate externally, without an apical spine; bars thinner than those of the preceding species, forming small, circular to oval cephalic pores and relatively large sagittal-lattice pores (Goll, 1958), bearing many, simple nodes on themselves. Secondary meshes are often present, but they are independent of the nodes and developed between pores. Two I are completely fused with the basal ring when one views from the base. Ax moderately developed. Thorax roughly latticed; the proximal part generally consisting of six or more longitudinal bars, one of which is a prolongation of D, and pierced by subcircular pores of large size, and the middle to distal part formed of thinner bars, terminated in needle-like or distally forked teeth. Thoracic pores change into angular shape of smaller size. Secondary meshes possibly developed on the proximal part of thorax.
Geological Range:
Last occurrence (top): within Langhian Stage (13.82-15.97Ma, top in Langhian stage). Data source:
First occurrence (base): within Langhian Stage (13.82-15.97Ma, base in Langhian stage). Data source:
Plot of occurrence data:
Sugiyama, K. & Furutani, H. (1992). Middle Miocene radiolarians from the Oidawara Formation, Mizunami Group, Gifu Prefecture, central Japan. Bulletin of the Mizunami Fossil Museum. 19: 199-213. gsReferences:
Dendrospyris sakaii compiled by the radiolaria@mikrotax project team viewed: 6-10-2024
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