radiolaria - rads_cenozoic - Siphostichartus corona radiolaria - rads_cenozoic - Siphostichartus corona

Siphostichartus corona

Classification: rads_cenozoic -> Artostrobiidae -> Siphostichartus -> Siphostichartus corona
Sister taxa: S. corona, S. praecorona, S. sp.


Citation: Siphostichartus corona (Haeckel) Nigrini 1977
Rank: species
Basionym: Cyrtophormis corona
Taxonomic discussion: (Haeckel)1887 p.1462 pl.77 fig.15; Riedel & Sanfilippo1971 p.1600; Nigrini 1977; Alexandrovich 1989 (ODP 111 SR) p.256 pl.3 fig.6 (synon)

Catalog entries: Cyrtophormis corona

Original description: Shell smooth, conical, ovate, with three deep strictures, about twice as long as broad. The fourth joint is the broadest, inflated, and three times as long as the second and the third joints. Pores small and numerous, circular, in regular, transverse rows; two in the first joint, four in the second and third, and ten in the fourth joint. Cephalis hemispherical, with a stout, pyramidal horn. Peristome two-thirds as broad as the fourth joint, with twelve to fifteen triangular, convergent teeth.

Length of the shell (with four joints) 160µm, breadth 80µm. Length of the single joints, a 10, b 30, c 30, d 90µm.
Remarks on original description: Haeckel listed Cyrtophormis corona under the subgeneric name Acanthocyrtis, but did not include the subgeneric name in the species name. This species is assigned to Acanthocyrtis (the junior homonym) Haeckel, 1887a (non Haeckel, 1881a).]


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:


Alexandrovich, J. M. (1989). Radiolarian biostratigraphy of ODP Leg 111, Site 677, eastern equatorial Pacific, late Miocene through Pleistocene. Proceedings of the Ocean Drilling Program, Scientific Results. 111: 245-262. gs V O

Haeckel, E (1887a). 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. (1977). Tropical Cenozoic Artostrobiidae (Radiolaria). Micropaleontology. 23(3): 241-269. gs

Riedel, W. R. & Sanfilippo, A. (1971). Cenozoic Radiolaria from the western tropical Pacific, Leg 7. Initial Reports of the Deep Sea Drilling Project. 7: 1529-1666. gs


Siphostichartus corona compiled by the radiolaria@mikrotax project team viewed: 26-3-2023

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