radiolaria - rads_cenozoic - Siphocampe pachyderma radiolaria - rads_cenozoic - Siphocampe pachyderma

Siphocampe pachyderma


Classification: rads_cenozoic -> Artostrobiidae -> Siphocampe -> Siphocampe pachyderma
Sister taxa: S. acephala, S. altamontensis, S. arachnea, S. bassilis, S. daseia, S. elizabethae, S. grantmackiei, S. imbricata, S. lineata, S. minuta, S. modeloensis, S. nodosaria, S. pachyderma, S. quadrata, S. septata, S. stathmeporoides, S. sp.

Taxonomy

Citation: Siphocampe pachyderma (Ehrenberg 1873)
taxonomic rank: species
Taxonomic discussion: (Ehrenberg) 1873; 1875; Caulet 1991

Catalog entries: Eucyrtidium pachyderma

Original description: [9-segmented, elongate, gracefully and slightly decurrent on all sides, Smooth) subfusiform; cephalis hemispherical, unarmed and not porous, with weak median rib; remaining segments each terminating in a single transverse row of pores) the last segment with pores very close to the penultimate row; terminal aperture truncate. Wall on each side thick, internally denticulate, with no external strictures. Four pores in the median part of each row, a single row between two lines (or in a furrow). Total length 113 µ, of the cephalis 15 µ. Two segments approx. 23 µ long.

Compare Eucyrtidium imbricatum. (Translated from Latin by E.M.R. and W.R.R.)]

Description

Biogeography and Palaeobiology


Similar species

pachyderma

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:

Caulet, J. (1991). Radiolarians from the Kerguelen Plateau, Leg 119. Proceedings of the Ocean Drilling Program, Scientific Results. 119: 513-546. gs

Ehrenberg, C. G. (1874b). Grössere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erläuterungen. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1873: 213-263. gs


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Siphocampe pachyderma compiled by the radiolaria@mikrotax project team viewed: 27-2-2024

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