radiolaria - rads_cenozoic - Sethodiscus radiolaria - rads_cenozoic - Sethodiscus


Classification: rads_cenozoic -> Coccodiscidae -> Sethodiscus
Sister taxa: Cypassis, Diartus, Didymocyrtis, Heterosestrum, Lithocyclia, Periphaena, Phacodiscus, Sethodiscus, Spongoliva, Stylocyclia, Trigonocyclia
Daughter taxa (time control age-window is: 0-800Ma)
Sethodiscus macrococcus

neptune records:
Sethodiscus sp.

neptune records:


Citation: Sethodiscus Haeckel 1881
taxonomic rank: genus
Basionym: Sethodiscus
Taxonomic discussion:

Catalog entries: Sethodiscus

Original description: 1a. Tribus: Sethodiscida. Phaeodiscida laevia aut .aspera, sine aculeis marginalibus.
A. testa medullari simplici.
AI. testa lentiformi sine zona.

Translated description: 1a. Tribe: Sethodiscida. Smooth or rough Phacodiscida, without marginal spines.
A. With single medullary shell.
AI. With the test lentiform, without equatorial zone. (Translated from Latin by E.M.R. and W.R.R.)]
Remarks on original description: [Haeckel (1887a, p.422) by his use of Sethodiscus indicates that Sethodiscus Haeckel, 1881a, p.430 is a junior homonym of Sethodiscus Haeckel, 1881a, p.457

Campbell, 1954, p.D78 replaced Sethodiscus Haeckel, 1881a, p.457 with Sethodiscinus Haeckel, 1887a, p.422]


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:


Haeckel, E. (1882a). Entwurf eines Radiolarien-Systems auf Grund von Studien der Challenger-Radiolarien [Basis for a radiolarian classification from the study of Radiolaria of the Challenger collection]. Jenaische Zeitschrift für Naturwissenschaft. 15: 418-472. gs O


Sethodiscus compiled by the radiolaria@mikrotax project team viewed: 22-5-2024

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