|Daughter taxa (time control age-window is: 0-800Ma)|
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]
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:
Tetraphormis compiled by the radiolaria@mikrotax project team viewed: 29-9-2023
Short stables page link: https://mikrotax.org/radiolaria/index.php?id=205731 Go to Archive.is to create a permanent copy of this page - citation notes