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radiolaria - rads_cenozoic - Excentrosphaerella sphaeroconcha radiolaria - rads_cenozoic - Excentrosphaerella sphaeroconcha

Excentrosphaerella sphaeroconcha


Classification: rads_cenozoic -> Heliodiscidae -> Excentrosphaerella -> Excentrosphaerella sphaeroconcha
Sister taxa: E. sphaeroconcha, E. sp.

Taxonomy

Citation: Excentrosphaerella sphaeroconcha Dumitrica 1978
Taxonomic rank: species
Synonyms:
1978 Excentrosphaerella sphaeroconcha - Dumitrica p.238; pl.5, figs.17-18, 22.
1992 Excentrosphaerella sphaeroconcha - Sugiyama and Furutani p.202; pl.12, fig.1-2; pl.16, fig.3

From Suzuki Paleotax db:

1978 Excentrosphaerella sphaeroconcha n. sp. Dumitrica p. 238, pl. 5, figs. 17, 18, 22
1992 Excentrosphaerella sphaeroconcha Dumitrica Sugiyama & Furutani p. 202, pl. 12, figs. 1, 2, pl. 16, fig. 3

Catalog entries: Excentrosphaerella sphaeroconcha

Original description: Both cortical shells spherical or subspherical, with circular or subcircular pores irregularly arranged. They are connected to one another and to the medullary shell by numerous thin radial beams. Outer surface thorny.

Diameter of microsphere 13µm, of outer medullary shell 55-65µm, of inner cortical shell 117-123µm, of outer cortical shell 217-240µm.

Description


Published descriptions


Sugiyama and Furutani 1992 - Excentrosphaerella sphaeroconcha

The externality of the cortical shell is considerably variable from smooth to spinous. Moreover, there are many individuals having a single or triple cortical shell.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:

References:

Dumitrica, P. (1978a). Badenian Radiolaria from central Paratethys. In, Brestenska (ed.) Chronostratigraphie end Neostratotypen Miozan der Zentralen Paratethys, Veda, volume 6. Verlag der Slowakischern Academis der Wissenschaften, Bratislava 231-261. gs

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

Missing or ambiguous references: ;


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Excentrosphaerella sphaeroconcha compiled by the radiolaria@mikrotax project team viewed: 21-4-2025

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