CATALOG OF ORIGINAL DESCRIPTIONS: Sethophormis aurelia 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 aurelia
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 aurelia

Citation: Sethophormis aurelia Haeckel 1887
Rank: species
Type specimens: pl.55, figs.3,4
Type repository: No information given
Described on page(s) : p.1248
Family (traditional): Plagiacanthidae
Family (modern): Theophormidae

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Current identification/main database link: Sethophormis aurelia Haeckel 1887

Original Description
Cephalis large, nearly hemispherical, with irregular, delicate network of small square meshes. Collar-septum with four large meshes, separated by a cross od four bars, opposite in pairs. Thorax flatly campanulate, with delicate, subregular, hexagonal meshes, and twenty-four prominent radial ribs; four of these are primary or perradial (centrifugal prolongations of the four bars of the collar-septum); four others are interradial or secondary, alternating with the former at angles of 45°; sixteen others are adradial or tertiary, interpolated between the first and second more or less irregularly. In some specimens the disposition of the twenty- four ribs was more regular, in others more irregular, than in the specimen figured (figs. 3, 4). The central capsule (fig. 4) exhibits a flat, cap-shaped part with the nucleus (enclosed in the cephalis), and four large, pear-shaped lobes protruded through the four large collar holes (somewhat deformed in the preparation figured). The wall of the thorax exhibits at the base four larger, nearly semi-circular pores, bisected by the four primary thoracic ribs. Peristome withtwenty-four indentations (between the prominent distal ends of the twenty-four ribs), often more distinct than in the specimen figured.

Cephalis 30µm long, 80µm broad; thorax 100µm to 200µm long, 400µm to 600µm broad.

Editors' Notes
Haeckel listed Sethophormis aurelia under the subgeneric name Astrophormis, but did not include the subgeneric name in the species name.
Stratigraphic information for LM21 from Riedel, 1959, p.287]


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

Riedel, W. R. (1959). Oligocene and Lower Miocene Radiolaria in tropical Pacific sediments. Micropaleontology. 5(3): 285-302. gs


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

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