1986 Acrosphaera pseudarktios - Caulet pl. 1, fig.8
From Suzuki Paleotax db:
1986 Acrosphaera pseudarktios n. sp. Caulet p. 226, pl. 1, fig. 8
Catalog entries: Acrosphaera pseudarktios
Original description: Shell surface smooth, spherical, with randomly arranged irregular pores of varying sizes (4--5 on a half-circumference). Two or more poreless spines up to one-third the length of the shell-diameter project outward from all pore margins. Spines forked and joined by very thin siliceous threads building an extra-cortical shell.
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 Missing or ambiguous references: Caulet 1986; References:
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Acrosphaera pseudarktios compiled by the radiolaria@mikrotax project team viewed: 15-5-2025
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