radiolaria - rads_cenozoic - Periphaena triactis

Periphaena triactis

Classification: rads_cenozoic -> Coccodiscidae -> Periphaena -> Periphaena triactis
Sister taxa: P. delta, P. dupla, P. heliasteriscus, P. triactis, P. tripyramis, P. decora, P. sp.


Citation: Periphaena triactis (Ehrenberg) Funakawa et al. 2006
Rank: species
Basionym: Haliomma triactis Ehrenberg 1873

Catalog entries: Haliomma triactis

Original description: [Capsule subglobose, broader, irregularly porous, with a densely hairy margin with small bristles; three strong diverging spines seem to arise from the median nucleus. Diameter of capsule 150 µ, of the nucleus 49 µ. Approx. 2½ - 3 distinct pores in 23 µ. Length of the largest spine 94 µ (Translated from Latin by E.M.R. and W.R.R.)]




Biogeography and Palaeobiology

Similar species


Geographic distribution


Phylogenetic relations

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:


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 V O

Funakawa, S., Nishi, H., Moore, T. C. & Nigrini, C. A. (2006a). Data report: Late Eocene–early Oligocene radiolarians, ODP Leg 199 Holes 1218A, 1219A, and 1220A, central Pacific. Proceedings of the Ocean Drilling Program, Scientific Results. 199: 1-74. gs O


Periphaena triactis compiled by the radiolaria@mikrotax project team viewed: 5-12-2022

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