radiolaria - rads_cenozoic - Axoprunum losbanosensis

radiolaria - rads_cenozoic - Axoprunum losbanosensis radiolaria - rads_cenozoic - Axoprunum losbanosensis

Axoprunum losbanosensis

Classification: rads_cenozoic -> Actinommidae -> Saturnalidae -> Axoprunum -> Axoprunum losbanosensis
Sister taxa: A. euterpe, A. liostylum, A. losbanosensis, A. monostylum, A. pierinae, A. stauraxonium, A. sp.

Taxonomy

Citation: Axoprunum losbanosensis (Clark&Campbell 1945)

Taxonomic rank: species

Basionym: Stylosphaera losbanosensis

Synonyms:

From Suzuki Paleotax db:

1945 Stylosphaera (Stylosphaerantha) losbanosensis n. sp. Clark & Campbell p. 12, pl. 1, figs. 20, 21

Taxonomic discussion: (Clark and Campbell) 1945, p.12, pl.1, figs.20-21; Shilov, 1995 (ODP 145 SR)

Catalog entries: Stylosphaera losbanosensis

Type images:

type image: S. losbanosensis

Original description: Shell globular, with 2 opposite, similar polar spines, these spines very short (only 0.43 diameter of cortical shell in length), generally conical in outline (25°), with sharply pointed free tip, circular section, and simple base; cortical shell thick-walled and very prominent with reference to the short spines and with a smooth surface; medullary shell globular, small (approximately 0.3 diameter of cortical shell), with rather thin polygonal framework and having few fairly thin prismatic radial beams (probably not a dozen); pores of cortical shell similarly everywhere circular and of nearly the same size, relatively few (about 10 across a diameter), and rather deeply set; pores of medullary shell large and few; framework of cortical shell raised, thick, and polygonal but without strong sepaloid points so that the surface is not modified.
Remarks on original description: The authors here list Stylosphaera minor losbanosensis under the subgeneric name Stylosphaerantha and include the subgeneric name in the species name.[comment from RadWorld database]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Axoprunum losbanosensis, synonyms included - Axoprunum losbanosensis;
See also space-time plot :: Samples map :: Parent: Axoprunum

References:
Clark, B. L. & Campbell, A. S. (1945b). Radiolaria from the Kreyenhangen Formation near Los Banos, California. Geological Society of America, Memoir. (10): 1-66. gs
Shilov, V. V. (1995a). Eocene-Oligocene radiolarians from Leg 145, North Pacific. Proceedings of the Ocean Drilling Program, Scientific Results. 145: 117-132. gs

Axoprunum losbanosensis compiled by the radiolaria@mikrotax project team viewed: 17-12-2025

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