radiolaria - rads_cenozoic - Siphonosphaera magnisphaera

Siphonosphaera magnisphaera

Classification: rads_cenozoic -> Collosphaeridae -> Siphonosphaera -> Siphonosphaera magnisphaera
Sister taxa: S. cyathina, S. hyalina, S. magnisphaera, S. martensi, S. patinaria, S. polysiphonia, S. socialis, S. tenera, S. vesuvius, S. sp.


Citation: Siphonosphaera magnisphaera Takahashi 1991
Rank: species
Basionym: Siphonosphaera magnisphaera
Taxonomic discussion: Lazarus 1992

Catalog entries: Siphonosphaera magnisphaera

Original description: Shell large, spherical, with numerous subcircular to polygonal small pores and 10 17 large polygonal pores of 1/4 1/2 length of the shell diameter. Number of the small and large pores are ca. 30 40 and 2 4 respectively on the half meridian. The large pores form very short tubules.

Shell diameter: 175 220 mm (6 specimens); large pore diameter: 12 64 mm (6 specimens). Distinguishing characters (rw): This species has a relatively large shell for Collosphaeridae, and differs from Siphonosphaera sp.A (Plate 4, figure 2) in shell size and in number and shape of small and large pores.




Biogeography and Palaeobiology

Similar species

Geographic distribution


Phylogenetic relations

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:


Lazarus, D. (1992). Antarctic Neogene radiolarians from the Kerguelen Plateau, Legs 119 and 120. In, Wise, S. W. Jr. , Schlich, R. et al. (ed.) . Proceedings of the Ocean Drilling Program, Scientific Results . 120: 785-809. gs V O


Siphonosphaera magnisphaera compiled by the radiolaria@mikrotax project team viewed: 5-12-2022

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