radiolaria - rads_cenozoic - Circodiscus microporus

Circodiscus microporus

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


Citation: Circodiscus microporus (Stoehr) Petrushevskaya and Kozlova 1972
Rank: species
Basionym: Trematodiscus microporus
Taxonomic discussion: (Stöhr) 1880; Petrushevskaya and Kozlova 1972

Catalog entries: Trematodiscus microporus

Original description: Runde Schale, elliptische Centralkammer, um die zwei elliptische Balken concentrisch verlaufen, so dass 2 elliptische Ringe um die Centralkammer entstehen, die gleich breit sind. Der äusserste Ring unregelmässig breit. Die Radialbalken nicht durchgehend, sondern unterbrochen. Die Löcher der Deckplatten klein, bei allen Ringen gleich gross und nicht ganz regelmässig angeordnet.
[Circular shell with an elliptical central chamber, around which two concentric arms constitute two elliptical rings of same width. The external ring of irregular width. Radial beams not developed through all the shell, but discontinuous. Pores small, of same size, and not very regularly distributed.
[In German. Translation by JPC]

Total breadth of the disc 140µm, dimensions of the elliptical central chamber 23 and 18µm. Dimensions of the second ellipse 66 and 83µm, width of the ring 23µm. Dimensions of third ellipse 100 and 83µm, width of the ring 17µm. Width of the external ring 17µm, width 27µm. Pores 16µm.




Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:


Petrushevskaya, M. G. & Kozlova, G. E. (1972). Radiolaria: Leg 14, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 14: 459-648. gs

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


Circodiscus microporus compiled by the radiolaria@mikrotax project team viewed: 4-7-2022

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