CATALOG OF ORIGINAL DESCRIPTIONS: Sethophormis eupilium Haeckel 1887

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.

Higher levels: rads_cat -> S -> Sethophormis -> Sethophormis eupilium
Other pages this level: S. arachnium, S. asteriscus, S. astrodiscus, S. aurelia, S. cruciata, S. dodecaster, S. enneactis, S. enneastrum, S. eupilium, S. floscula, S. hexagonalis, S. hexalactis, S. leptopilium, S. leptoscenium, S. medusa, S. octalactis, S. pentalactis, S. rotula, S. triloba, S. umbrella

Sethophormis eupilium

Citation: Sethophormis eupilium Haeckel 1887
Rank: species
Type specimens: pl.56, fig.9
Type repository: No information given
Described on page(s) : p.1247
Family (traditional): Theoperidae
Family (modern): Acropyramiidae

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Current identification:

Original Description
Cephalis very small, hemispherical, hyaline, without pores. Thorax flatly pyramidal, with nine concave, triangular faces and nine little curved, stout, radial beams. Between these are interpolated numerous incomplete secondary beams, which are absent in the apical part of the thorax. The radial beams being connected by numerous (thirty to forty or more) horizontal, ring-like threads, a delicate, arachnoidal network with small, quadrangular pores is produced. Peristome nine-angled, with a peculiar vertical gallery, composed of four horizontal, parallel, nine-angled rings, which are connected by numerous vertical, parallel bars, therefore with three transverse rows of square pores. This peculiar species is very different from the preceding and may represent a separate genus, Craspedilium.

Cephalis 100µm diameter, thorax 100µm long, 250µm broad.

Editors' Notes
Haeckel listed Sethophormis eupilium under the subgeneric name Enneaphormis, but did not include the subgeneric name in the species name.
The "preceding species" refers to Sethophormis enneactis in Haeckel, 1887a.]


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs


Sethophormis eupilium compiled by the radiolaria@mikrotax project team viewed: 19-4-2021

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