radiolaria - rads_cenozoic - Acrosphaera pseudarktios <title>radiolaria - rads_cenozoic - Acrosphaera pseudarktios

Acrosphaera pseudarktios

Classification: rads_cenozoic -> Collosphaeridae -> Acrosphaera -> Acrosphaera pseudarktios
Sister taxa: A. arktios, A. australis, A. collina, A. cyrtodon, A. flammabunda, A. hamospina, A. labrata, A. lappacea, A. mercurius, A. murrayana, A. pseudarktios, A. spinosa, A. trepanata, A. sp.


Citation: Acrosphaera pseudarktios Caulet 1986
Rank: species
Basionym: Acrosphaera pseudarktios
Taxonomic discussion: Caulet 1986

Catalog entries: Acrosphaera pseudarktios




Biogeography and Palaeobiology

Similar species

Geographic distribution


Phylogenetic relations

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:


Caulet, J. (1986a). A refined radiolarian biostratigraphy for the Pleistocene of the temperate Indian Ocean. Marine Micropaleontology. 11(1-3): 217-229. gs


Acrosphaera pseudarktios compiled by the radiolaria@mikrotax project team viewed: 30-1-2023

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Comments (1)

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Maqsood Ur Rahman (Wuhan, China)

The species is reported from Late Pleistocene in IODP expiration 369 hole 1516B.

the uploaded Photo is in 40X with 10X objective.

Jeremy Young (London, UK)

Maqsood. Thank you for the comment - I don't seem to be able to find any uploaded image though. If you wish to you can send it direct to me using the email



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