radiolaria - rads_cenozoic - Otosphaera auriculata radiolaria - rads_cenozoic - Otosphaera auriculata

Otosphaera auriculata

Classification: rads_cenozoic -> Collosphaeridae -> Otosphaera -> Otosphaera auriculata
Sister taxa: O. annikae, O. auriculata, O. tenuissima, O. sp.


Citation: Otosphaera auriculata Haeckel 1887
taxonomic rank: species
Basionym: Otosphaera auriculata
Taxonomic discussion: Haeckel, 1887 p.116 pl.7 fig.5; emend.Nigrini,1967 p.22 pl.1 fig.7;Nigrini & Moore,1979 p.S7

Catalog entries: Otosphaera auriculata

Original description: Shell quite irregular, of extremely variable form, now inclining to roundish, now to polyhedral, with very numerous small pores, irregularly formed and distributed. Twelve to twenty-four pores in the half meridian of the shell, of very different size, for the most part larger than the bars. Porous tubuli of the shell of variable number (in one and the same colony), one to five, mostly three or four, of conical form, irregularly formed and scattered, commonly about half as long as the radius of the shell. Outer aperture of the tubuli obliquely truncated, with one large prominent, often curved, acute tooth.

Diameter of the shell 0.1 to 0.2, of the pores 0.003 to 0.005; length of the tubuli 0.01 to 0.05, inner aperture 0.04, outer aperture 0.03. [dimensions in mm]
Remarks on original description: [Stratigraphic information for LM21 from Riedel, 1959, p.287.]


Biogeography and Palaeobiology

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:


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. 18: 1-1803. gs O

Nigrini, C. A. & Moore, T. C. Jr. (1979). A guide to modern Radiolaria. Cushman Foundation for Foraminiferal Research, Special Publication. 16: 1-260. gs O

Nigrini, C. A. (1967). Radiolaria in pelagic sediments from the Indian and Atlantic Oceans. Bulletin of the Scripps Institution of Oceanography. 11: 1-125. gs


Otosphaera auriculata compiled by the radiolaria@mikrotax project team viewed: 16-6-2024

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