Sethophormididae


Classification: rads_cenozoic -> Plagiacanthidae -> Sethophormididae
Sister taxa: Lophophaenidae, Plagiacanthidae (ss), Plagiacanthidae inc sed, Sethoperidae, Sethophormididae, Theopiliidae,
Daughter taxa: (blue => in age window 0-800Ma) Granddaughter taxa

neptune records:


neptune records:


neptune records:


neptune records: 268

Taxonomy

Rank: family (new classif)
Type species: Sethophormis Haeckel 1881
Notes & discussion: This family is part of the revised classification system being developed by Prof. Suzuki and colleagues

Catalog entries: Sethophormidae [no catalog entry yet]

Description

Distinguishing features: Wide conical or nearly flat 2 segmented forms with relatively large but inconspicuous highly flattened cephalis.


Morphology remarks:

De Wever etal. 2001: Usually wide conical to flat dicyrtid nassellarians with relatively large cephalis, sometimes reduced to some arches.  Basal structure with MB, a shart A, and well developed D and L spines, and arches AD and AL. Spines V and l missing. 

Biogeography and Palaeobiology


Biogeography:

Paleobiology:

Phylogenetic relations:

Similar species:

Biostratigraphic distribution

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:

References:


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Sethophormididae compiled by the radiolaria@mikrotax project team viewed: 1-10-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=206154 Go to Archive.is to create a permanent copy of this page - citation notes



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