Siphostichartus corona

Taxonomy

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).]

Description

Published descriptions

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:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Siphostichartus corona, synonyms included - Phormostichoartus corona; Phormostichoartus coronata; Siphostichartus corona; Siphostichoartus corona; Theocamptra corona;
• See also space-time plot :: Samples map :: Parent: Siphostichartus

Siphostichartus corona compiled by the radiolaria@mikrotax project team viewed: 10-12-2023 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205412 Go to Archive.is to create a permanent copy of this page - citation notes

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