CATALOG OF ORIGINAL DESCRIPTIONS: Sethophormis cruciata 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 cruciata
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 cruciata

Citation: Sethophormis cruciata Haeckel 1887
Rank: species
Type repository: No information given
Described on page(s) : p.1243
Family (traditional): Plagiacanthidae

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Current identification:

Original Description
Cephalis very large, hemispherical, with irregular, delicate network of small square meshes. Thorax flatly campanulate, with delicate, regular network of small hexagonal meshes. All bars very thin, thread-like. Four stout radial thoracic ribs, crossed in pairs, lie in two meridional planes, perpendicular to one another. Very similar to Sethophormis aurelia (Pl. 55, figs. 3, 4), but not so flat, and with only four thoracic ribs. Peristome or margin of the thoracic mouth smooth, circular.

Cephalis 0.04 long, 0.08 broad; thorax 0.12 long, 0.36 broad.

Editors' Notes
There was no illustration of this species in Haeckel (1887)
Haeckel listed Sethophormis cruciata under the subgeneric name Tetraphormis, but did not include the subgeneric name in the species name.


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

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