radiolaria - rads_cenozoic - Tetraphormis radiolaria - rads_cenozoic - Tetraphormis


Classification: rads_cenozoic -> Plagiacanthidae -> Sethophormididae -> Tetraphormis
Sister taxa: Enneaphormis, Genetrix, Sethophormis, Tetraphormis, Velicucullus
Daughter taxa (time control age-window is: 0-800Ma)
Tetraphormis dodecaster

neptune records:
Tetraphormis sp.

neptune records:


Citation: Tetraphormis Haeckel 1881
Rank: genus
Basionym: Tetraphormis
Taxonomic discussion:

Catalog entries: Tetraphormis

Original description: 2c. Tribus: Sethophormida. Dycyrtida aperta multiradiata.
A. Sethophormida complanata (testa plana, secundo articulo disciformi aut parum elevato radiis 4 aut pluribus fortibus, valde divergentibus, primo articulo plerumque magno obtuso).
AI. costis secundi articuli quatuor.

Translated description: 2c. Tribe: Sethophormida. Multiradiate, open Dyocyrtida.
A. Flattened Sethophormida (shell flat, with second segment
disciform or slightly elevated, with 4 or more strong radii, strongly divergent, with the first segment usually large and obtuse).
AI. With four ribs of the second segment. (Translated from Latin by E.M.R. and W.R.R.)]
Remarks on original description: [Synonymized with Sethophormis Haeckel, by Petrushevskaya, 1971b]


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): at base of Gelasian Stage (0% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Haeckel, E. (1882a). Entwurf eines Radiolarien-Systems auf Grund von Studien der Challenger-Radiolarien [Basis for a radiolarian classification from the study of Radiolaria of the Challenger collection]. Jenaische Zeitschrift für Naturwissenschaft. 15: 418-472. gs O


Tetraphormis compiled by the radiolaria@mikrotax project team viewed: 29-9-2023

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