|Daughter taxa (time control age-window is: 0-800Ma)|
Catalog entries: Trigonocyclia
Original description: Coccodiscida with three solid radial spines on the margin of the circular disk. Medullary shell simple.
The genus Trigonocyclia (only known by one single species, once observed) bears on the margin of the chambered disk three solid radial spines, at equal distances one from another. It corresponds to the genus Tripodictya amongst the Porodiscida.
Remarks on original description: Junior objective synonym of Tripodydlia Haeckel, 1881a
Last occurrence (top): at top of Chattian Stage (100% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Trigonocyclia compiled by the radiolaria@mikrotax project team viewed: 7-2-2023
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