radiolaria - rads_cenozoic - Sethophormididae

Sethophormididae

Classification: rads_cenozoic -> Plagiacanthidae -> Sethophormididae
Sister taxa: Lophophaenidae, Plagiacanthidae (ss), Plagiacanthidae inc sed, Sethoperidae, Sethophormididae, Theopiliidae

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	Enneaphormis neptune records:	E. rotula E. sp.
	Sethophormis neptune records:	S. aurelia S. sp.
	Tetraphormis neptune records:	T. dodecaster T. sp.
	Velicucullus neptune records: 268	V. altus V. magnificum V. oddgurneri V. palaeocenica V. sp.

Taxonomy

Rank: family (new classif)

Type species: Sethophormis Haeckel 1881

Taxonomic 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:
Parent taxon (Plagiacanthidae):
This taxon: Wide conical or nearly flat 2 segmented forms with relatively large but inconspicuous highly flattened cephalis.

Morphology:

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

Biostratigraphic distribution

Geological Range:
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:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Plagiacanthidae

References:

Sethophormididae compiled by the radiolaria@mikrotax project team viewed: 20-10-2021

Taxon Search:

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Short stable page link: https://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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