Classification: rads_cenozoic -> Spongodiscidae -> Euchitoniidae -> Rhopalastrum
Sister taxa: Amphicraspedum, Dictyocoryne, Myelastrum, Perichlamydium, Rhopalastrum, Spongaster, Tessarastrum
Daughter taxa: (blue => in age window 0-800Ma)
Rhopalastrum abyssorum

neptune records:
Rhopalastrum angulatum

neptune records: 2
Rhopalastrum oracutibrachium

neptune records:
Rhopalastrum sp.

neptune records: 175


Citation: Rhopalastrum Ehrenberg 1847
Rank: genus
Basionym: Rhopalastrum

Catalog entries: Rhopalastrum

Original description: Testarum enucleatae e cellulis binis (longitudinaliter constrictae) aut e cellulis appositis multis coalitae (Effusae planae aut teretes et subglobosae). Testarum cellulae concentricae aut spirales, tenues plurimae, passim ordine nullo spongiosae. Testae radiatae in stellae formam abeuntes (spongiosae). Radiis liberis spongiosis liberis turgidis.

Translated description: Test enucleate, with two chambers (longitudinally constricted), or formed of many chambers grown together (spread in a plane or rounded and subglobose). Chambers of test concentric or spiral, mostly delicate, spongy and irregular. Test radiate, in a stellate form (spongy). Radii free, spongy, free, swollen. (Translated from Latin by E.M.R. and W.R.R.)]


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:


Ehrenberg, C. G. (1847). Uber die mikroskopischen kieselschaligen Polycystinen als machtige Gebirgsmasse von Barbados und uber das Verhaltniss der aus mehr als 300 neuen Arten bestehenden ganz eigenthumlichen Formengruppe jener Felsmasse zu den jetzt lebenden Tieren und zur. Bericht uber die zu Bekanntmachung geeigneten Verhandlungen der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1847: 41-60. gs


Rhopalastrum compiled by the radiolaria@mikrotax project team viewed: 24-11-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205292 Go to Archive.is to create a permanent copy of this page - citation notes

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