radiolaria - rads_cat - Stylosphaera minor minorradiolaria - rads_cat - Stylosphaera minor minor
CATALOG OF ORIGINAL DESCRIPTIONS: Stylosphaera minor minor Clark & Campbell 1942
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Stylosphaera (Stylosphaerantha) minor minor Clark and Campbell 1942.jpg
Stylosphaera minor minor
Citation: Stylosphaera minor minor Clark & Campbell 1942Taxonomic rank: sub-speciesDescribed on page(s) : p.27Type specimens: pl.5, figs.1,2Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): ActinommidaeFamily (modern): Rhizosphaeridae
Current identification:
Original Description Shell globular with two opposite polar spines of equal length, these rather thin and sharp, distinctly three-angled with the interfaces parallel to the planes of the angles, tips sharp; cortical shell spherical, wall moderately thick, surface with subcircular pores becoming subhexagonal as the sepaloid points develop in the distal section, pores about four or five across a radius; medullary shell about 0.25 of the cortical one diameter, with eight or ten subhexagonal pores across the diameter, bars very thin, with approximately eight beams, two polar beams thicker than the others. Size: Length of polar spines, 110µm; diameter of the cortical shell, 100µm; of the medullary shell, 25.4µm; of the pores, 10µm; width of wall, 10µm. Extra details from original publication Distinguishing characters:Stylosphaera minor minor n. subsp. differs from S. minor leptoxyphos n. subsp. in thicker, heavier polar spines which are shorter, also, than in that subspecies. Editors' Notes [The authors here list this species under the subgeneric name Stylosphaerantha and include the subgeneric name in the species name.
References:
Clark, B. L. & Campbell, A. S. (1942a). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs
Stylosphaera minor minor compiled by the radiolaria@mikrotax project teamviewed: 21-5-2025
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 minor minor Clark and Campbell 1942.jpg)
Stylosphaera (Stylosphaerantha) minor minor Clark and Campbell 1942.jpg minor minor Clark and Campbell 1942.jpg)
Stylosphaera (Stylosphaerantha) minor minor Clark and Campbell 1942.jpg
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