CATALOG OF ORIGINAL DESCRIPTIONS: Stylosphaera hexaxyphophora hexaxyphophora Clark & Campbell 1942
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Stylosphaera (Stylosphaerella) hexaxyphophora hexaxyphophora Clark and Campbell 1942.jpg
Stylosphaera hexaxyphophora hexaxyphophora
Citation: Stylosphaera hexaxyphophora hexaxyphophora Clark & Campbell 1942Taxonomic rank: sub-speciesDescribed on page(s) : p.28Type specimens: pl.5, fig.4Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): ActinommidaeFamily (modern): Amphisphaeridae
Current identification:
Original Description Shell globular, minutely spiny, and with six elongate spines, those subequal, approximately equidistant, all in one plane, rather thin and almost needle-like, the base only three-angled, the remainder and most of the spine being rounded in cross section; cortical shell thick-walled, large, surface with subuniformly subcircular to oval pores, about seven in number across a radius, with sepaloid projections extended as short, sharp spines, the pores sunken within hexagonal areas; medullary shell about 0.3 diameter of cortical shell, very dense, with three to five pores of irregular shape across a radius, thick bars, and with six supporting beams. Size: Length of spines, 210µm, three of them broken in the type; diameter of cortical shell, 170µm; of medullary shell, 57.2µm; of pores, 11µm; thickness of wall of cortical shell, 17.6µm. Extra details from original publication Distinguishing characters:Stylosphaera hexaxyphophora hexaxyphophora n. subsp. differs from S. hexaxyphophora octoxyphophora n. subsp. and from hexaxyphophora pentaxyphophora n. var. in having six spines, these latter having eight and five spines respectively. Editors' Notes [The authors here list this subspecies under the subgeneric name Stylosphaerella 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 hexaxyphophora hexaxyphophora compiled by the radiolaria@mikrotax project teamviewed: 20-5-2025
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