Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | Trigonocyclia prima neptune records: | |||
Trigonocyclia sp. neptune records: |
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
Geological Range:
Last occurrence (top): at top of Chattian Stage (100% up, 23Ma, in Chattian 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:
Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gsReferences:
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Trigonocyclia compiled by the radiolaria@mikrotax project team viewed: 1-3-2021
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205935 Go to Archive.is to create a permanent copy of this page - citation notes |