radiolaria - rads_cenozoic - Circodiscus circularis radiolaria - rads_cenozoic - Circodiscus circularis

Circodiscus circularis

Classification: rads_cenozoic -> Litheliidae -> Larnacillidae -> Circodiscus -> Circodiscus circularis
Sister taxa: C. circularis, C. ellipticus, C. microporus, C. sp.


Citation: Circodiscus circularis Clark&Campbell 1942
taxonomic rank: species
Basionym: Circodiscus circularis

Catalog entries: Porodiscus circularis

Original description: Shell circular, cakelike in shape with a flat edge; all rings (four or five) circular, concentric, annular, regularly increasing in breadth from the center to the periphery, connected by numerous thin, commonly alternating radial beam, some of which are piercing and some not; pores rather small, of several sizes, regularly subcircular, three or four on the breadth of a ring; margin of disk slightly spiny, with small, irregular spines of different lengths.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:



Circodiscus circularis compiled by the radiolaria@mikrotax project team viewed: 20-6-2024

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