From Suzuki Paleotax db:
1887 Arachnocalpis ellipsoides n. sp. Haeckel p. 1172-1173, pl. 98, fig. 13
1991 Arachnocalpis ellipsoides Haeckel Takahashi p. 136, pl. 46, fig. 17
1999 Arachnocalpis ellipsoides Haeckel Tan & Chen p. 294-295, text-fig. 5.218
2003 Arachnocalpis ellipsoides Haeckel Tan & Su p. 125, pl. 16, fig. 11; text-fig. 99
Catalog entries: Arachnocalpis ellipsoides
Original description: Shell ellipsoidal, one and a half times as long as broad, on the apical pole hemispherical, on the basal pole coronate, with an elegant prominent funnel-shaped peristome, which is one-eighth as broad as the shell, fenestrated by very fine pores, and bears fifteen to twenty short conical divergent teeth. Inner shell with irregular polygonal meshes of very different size, separated by thin, finely denticulate bars. Outer spongy shell very delicate, arachnoidal, with numerous prominent conical spongy papillæ. Central capsule ellipsoidal, half as long and broad as the shell.
Remarks on original description: see Arachnocalpis sphaeroides and Spongocyrtis arachnoides in Haeckel, 1887a.[comment from RadWorld database]
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:
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Arachnocalpis ellipsoides compiled by the radiolaria@mikrotax project team viewed: 15-8-2026
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