- Type images:
type image: C. arachnoides
type material: C. arachnoides
From Suzuki Paleotax db:
1887 Clathrosphaera (Clathrosphaerium) arachnoides n. sp. Haeckel p. 119, pl. 8, fig. 7
1991 Clathrosphaera arachnoides Haeckel Takahashi p. 55, pl. 1, fig. 15
Catalog entries: Clathrosphaera arachnoides
type image: C. arachnoides
type material: C. arachnoidesOriginal description: Inner shell spherical, with irregular roundish meshes, two or three times as broad as the bars. Ten to twelve meshes in the half meridian of the shell. From its surface arise numerous conical radial spines (with base often fenestrated), which at equal distances from the surface send out lateral branches. All these branches lie on a spherical face, and form by communications the irregular, very delicate, arachnoid network of the outer shell, quite unlike that of the inner, with large polygonal meshes of very different size. Eight to sixteen meshes in the half meridian of the shell. Surface of the outer shell nearly spherical, somewhat uneven, like a spider's web. The radius of the inner shell bears to that of the outer a ratio = 3: 4.
Diameter of the inner shell 0.12 to 0.14, of the outer 0.15 to 0.18; pores of the inner shell 0.003 to 0.02, of the outer 0.01 to 0.04. [dimensions in mm]
Remarks on original description: Haeckel listed Clathrosphaera arachnoides under the subgeneric name Clathrosphaerium, but did not include the subgeneric name in the species name.
Stratigraphic information for LM21 from Riedel, 1969, p.287
Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
References:
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Clathrosphaera arachnoides compiled by the radiolaria@mikrotax project team viewed: 10-12-2024
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