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.


Citation: Siphocampe pachyderma (Ehrenberg 1873)
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.)]




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:


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. (1873a). Grössere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erläuterungen. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1873: 213-263. gs

Ehrenberg, C. G. (1876). Forsetzung der Mikrogeologischen Studien als Gesammt Ubersicht der mikroskopischen Palaontologie gleichartig analysierter Gebiegsarten der Erde, mit specieller Rucksicht aus den Polycystinen Mergel von Barbados. Abhandlungen der Koniglichen Akademie der Wissenschaften zu Berlin. 1875: 1-226. gs


Siphocampe pachyderma compiled by the radiolaria@mikrotax project team viewed: 30-9-2022

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