CATALOG OF ORIGINAL DESCRIPTIONS: Stylosphaera angelina Campbell & Clark 1944
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Stylosphaera (Stylosphaerella) angelina Campbell and Clark 1944.jpg
Stylosphaera angelina
Citation: Stylosphaera angelina Campbell & Clark 1944Taxonomic rank: speciesDescribed on page(s) : p.12Type specimens: pl.1, figs.14-20Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): ActinommidaeFamily (modern): Saturnalidae
Current identification:
Original Description Shell large, globular, with spiny surface and two equal, opposite polar spines at least as long as diameter of shell and sometimes longer, rather thick (about 0.06 their length in diameter), circular in section, bases with about 12 short, vertical ridges, and blunted tips with the subadjacent sides roughened; cortical and medullary shells both spherical, latter nearly 0.5 diameter of former; supporting beams obscure because of great density of cortical shell; wall of cortical shell thick (at least 0.15 trans-diameter), extremely dense, wall of medullary shell thinner; surface of cortical shell spiny, by-spines arising as sepaloid points from pore-framework so that whole surface is like a burr, some of by-spines anastomosed and forming a sort of cactuslike feltwork raised above general shell-surface, medullary shell smooth; pores of cortical shell subuniformly subcircular, 36 or more around a diameter, rather closely and deeply set into thick lattice-framework, from outer surface of which arise by-spines (their length generally greater than 0.08 length of polar spines), pore-framework with funnel-shaped apertures, pores of medullary shell smaller and less numerous than those of cortical shell, less in diameter than shell-substance which separates them. Size: Length total, 300µm, of polar spines, 110µm; diameter of cortical sphere, 80µm, of its pores, 8.8µm. Extra details from original publication Distinguishing characters:Stylosphaera angelina n.sp. differs from setosa (Ehrenberg, 1872) in possessing subcircular, rather than subhexagonal, and more numerous pores, and a thick wall. Medullary shell larger than in latter. Almost exactly like Xyphosphaera pallas (Haeckel, 1887, p1.14, fig.4), save that there are two concentric spheres rather than one. This Miocene species is apparently a virile, pelagic form adapted, in presence of long polar spines and bristly surface, to flotation near surface of sea. Editors' Notes [The authors here list this species under the subgeneric name Stylosphaerella and include the subgeneric name in the species name. Synonymized with Stylosphaera hispida Ehrenberg group by Petrushevskaya 1975c.]
References:
Campbell, A. S. & Clark, B. L. (1944). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs
Petrushevskaya, M. G. (1975a). Cenozoic radiolarians of the Antarctic, Leg 29, DSDP. Initial Reports of the Deep Sea Drilling Project. 29: 541-675. gsO
Stylosphaera angelina compiled by the radiolaria@mikrotax project teamviewed: 29-4-2025
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Stylosphaera (Stylosphaerella) angelina Campbell and Clark 1944.jpg angelina Campbell and Clark 1944.jpg)
Stylosphaera (Stylosphaerella) angelina Campbell and Clark 1944.jpg
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