arrayname: original
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | Circodiscus circularis neptune records: 32 | |||
![]() | ![]() | Circodiscus ellipticus neptune records: 116 | ||
![]() | ![]() | ![]() | ![]() | Circodiscus microporus neptune records: |
Circodiscus sp. neptune records: |
Catalog entries: Circodiscus
Original description: Slightly convex skeleton with round or oval outline. Consists of frontal, sagittal and equatorial girdles, their wings connected to form regular round or oval rings. First system is of the ""Trizonium-type"" (in sensu Haeckel), its dimension = 30-40µm, with fully developed girdles; in the rest of them, only the equatorial girdle is fully developed; sagittal and frontal girdles terminate at the point of the junction with the ring of the previous system; distance between ‘width of rings) is considerably larger than the diameter of the central chamber. Soines (four main and four secondary) pass inside of the skeleton. Rim is smooth.
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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Circodiscus compiled by the radiolaria@mikrotax project team viewed: 25-3-2025
Short stable page link: https://mikrotax.org/bforams/index.php?id=203524 Go to Archive.is to create a permanent copy of this page - citation notes |
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