radiolaria - rads_cenozoic - Dendrospyris sakaii radiolaria - rads_cenozoic - Dendrospyris sakaii

Dendrospyris sakaii


Classification: rads_cenozoic -> Trissocyclidae -> Trissocyclidae inc sed -> Dendrospyris -> Dendrospyris sakaii
Sister taxa: D. acuta, D. anthocyrtoides, D. binapertonis, D. bursa, D. fragoides, D. golli, D. inferispina, D. megalocephalis, D. pannosa, D. pododendros, D. sakaii, D. stylophora, D. turriturcica, D. sp.

Taxonomy

Citation: Dendrospyris sakaii Sugiyama & Furutani 1992
taxonomic rank: species
Basionym: Dendrospyris sakaii Sugiyama & Furutani 1992
Synonyms:
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.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

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:

References:

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. gs


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Dendrospyris sakaii compiled by the radiolaria@mikrotax project team viewed: 6-10-2024

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