radiolaria - rads_cenozoic - Ommatodiscus

Ommatodiscus


Classification: rads_cenozoic -> Litheliidae -> Litheliidae (ss) -> Ommatodiscus
Sister taxa: Conocaryomma, Lithelius, Middourium, Ommatodiscus
Daughter taxa (time control age-window is: 0-800Ma)
Ommatodiscus murrayi

neptune records:
Ommatodiscus sp.

neptune records: 4

Taxonomy

Citation: Ommatodiscus Stohr 1880
Rank: genus
Basionym: Ommatodiscus

Taxonomic discussion:
Has been assigned to Spongodiscidae, here assigned to Litheliidae following new classification being developed by Suzuki & co-workers

Catalog entries: Ommatodiscus


Translated description: Stöhr gives no definition for the genus, but only for the new family of Ommatodiscida, probably because he says that there is only one genus in this family. This definition is given here for the genus.)]

Über die beiden Seiten einer rundlichen, elliptischen oder eiförmigen Medianplatte, die aus concentrisch verlaufenden Septalbalken gebildet ist, welche durch Radialbalken geschnitten werden, erheben sich gleichförmig symmetrisch, mehr oder weniger hoch, zellig spongiöse Gebilde, so dass die ganze Form kugelig, ellipsoidisch oder auch linsenförmig wird. Über das ganze legen sich 2 poröse Deckplatte meist mit kleinen Stacheln besetz, und welchen sich an die Unebenheiten der darunter liegenden zelligen Masse anschliessen. Die Radialbalken der Medianplatte setzen nach aussen an der Peripherie als kleine Zacken umgebene Mündungsöffnung. Nicht selten befindet sich im Centrum der Medianplatte eine kleine Gitterkugel.
On both sides of a circular, elliptical, or ovoid, median plate, constructed by concentrically distributed septa that are fragmented by radial beams, are erected regularly symmetrical and more or less important, structures of cellular spongious material, so that the global form is globular, ellipsoidal, or lenticular. Above all, there are two porous deck plates, mostly with small spines, related to the inferior unequal mass of spongious material. The radial beams of the median plate form at the periphery small protuberances surrounding an aperture. A small lattice sphere is not rarely found at the centre of the median plate. (In German. Translated by J.P.C.)]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Piacenzian Stage (100% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Stöhr, E. (1880). Die Radiolarienfauna der Tripoli von Grotte, Provinz Girgenti in Sicilien. Palaeontographica N. F.. 6(4): 71-121. gs


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Ommatodiscus compiled by the radiolaria@mikrotax project team viewed: 21-9-2021

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204821 Go to Archive.is to create a permanent copy of this page - citation notes



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