radiolaria - rads_cenozoic - Hexalonche nakasekoi radiolaria - rads_cenozoic - Hexalonche nakasekoi

Hexalonche nakasekoi


Classification: rads_cenozoic -> Actinommidae -> Actinommidae inc sed -> Hexalonche -> Hexalonche nakasekoi
Sister taxa: H. amphisiphon, H. esmarki, H. heteracantha, H. nakasekoi, H. philanahedra, H. philosophica, H. sp.

Taxonomy

Citation: Hexalonche nakasekoi Petrushevskaya 1979
Taxonomic rank: species
Basionym: Hexalonche nakasekoi
Synonyms:

From Suzuki Paleotax db:

1979 Hexalonche nakasekoi Petrushevskaya n. sp. Kozlova & Petrushevskaya p. 90-91, figs. 206, 207
Taxonomic discussion: Petrushevskaya & Kozlova 1979 p.90 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

Description

Biogeography and Palaeobiology

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:

References:

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 O


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Hexalonche nakasekoi compiled by the radiolaria@mikrotax project team viewed: 21-6-2025

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