Schizodiscus codrant


Classification: rads_cenozoic -> Spongodiscidae -> Stylodictyidae -> Schizodiscus -> Schizodiscus codrant
Sister taxa: S. codrant, S. disymmetricus, S. favus, S. sp.

Taxonomy

Citation: Schizodiscus codrant Petrushevskaya 1975
Rank: species
Basionym: Schizodiscus codrant

Catalog entries: Schizodiscus codrant

Original description: Skeleton in a form of the regular disk, but with the recess in the middle of each flattened surface. It may be named a concave lens. From a recess short spines arise (by-spines?), which support the gown. The latter forms a small lid above the recess. Gown with small pores and similar to the gown in Spongodiscus resurgens osculosus, where the middle part of the gown is also supported by the spines. Distinguishing characters (rw): Schizodiscus codrant differs from S. resurgens osculosus by having larger and more rough and irregular spongy meshes. Schizodiscus codrant differs from Schizodiscus favus maxima and from Schizodiscus disymmetricus by the concave form of its main disk. The form of the disk in Schizodiscus codrant is very similar to that in Orbiculiforma vacaensis Pessagno, 1973 (compare pl. 17, fig. 1-6 with Plate 38, Figure 7 in the present paper).
Remarks on original description: The description is based on 57 specimens from Site 278, (Cores 27 and others).

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:


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Schizodiscus codrant compiled by the radiolaria@mikrotax project team viewed: 25-10-2020

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