From Suzuki Paleotax db:
1979 Hexalonche nakasekoi Petrushevskaya n. sp. Kozlova & Petrushevskaya p. 90-91, figs. 206, 207
Catalog entries: Hexalonche nakasekoi
Original description: Approximately 15 pores on half the equator of the II [cortical] shell and 6 on the I [medullary] shell. Pores irregular in shape and distribution with frames. Diameter of the medullary shell 25-30µ, of the cortical shell 120-150µ. All radial beams linking the shells are not protruding above the surface of the cortical shell, as external spines; a few of them are slightly elongated outside. There are some external spines, thin (with a basis of 3-5µ) and short. Their sides are slightly differentiated. (In Russian. Translation by J.P.C.)
Remarks on original description: and next cores down to 338-14-CC
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:
Petrushevskaya, M. G. & Kozlova, G. E. (1979). Opisanie rodov i vidov radiolyariy [Description of the radiolarian genera and species.]. In, Sterlkov, A. A. & Petrushevskaya, M. G. (eds) Istoriya mikroplanktona Norvezhskogo Morya [The history of the microplankton of the Norwegian Sea (based on Deep Sea Drilling materials)]. Issledovanie Faunyi Morey (Akademii Nauk SSSR) Leningrad . 23(31): 86-157. gs OReferences:
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Hexalonche nakasekoi compiled by the radiolaria@mikrotax project team viewed: 21-6-2025
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