radiolaria - rads_cat - Staurotholonium biquadratum radiolaria - rads_cat - Staurotholonium biquadratum

CATALOG OF ORIGINAL DESCRIPTIONS: Staurotholonium biquadratum 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 -> Staurotholonium -> Staurotholonium biquadratum
Other pages this level: S. alternatum, S. bicruciatum, S. biquadratum, S. lenticulare, S. octodoratium, S. octodoronium

Staurotholonium biquadratum

Citation: Staurotholonium biquadratum Haeckel 1887
Taxonomic rank: species
Described on page(s) : p.675
Type age (chronostrat): [presumably Quaternary]
Type locality: LM38
Type repository: No information given

Current identification:


Original Description

Outer cortical shell smooth, of the same regular crucial form as the inner, equidistant from it everywhere. Form and structure of both cortical shells nearly the same, but the outer about twice as large as the inner; both connected only by eight diagonal beams. All four cupolas of each cortical shell regular, of the same size. Pores regular, circular, twice as broad as the bars; six to eight in the basal semicircle of each cupola. Medullary shell square. (Similar to Staurotholus quadratus, but differs by the double cortical shell.)

Size:
Diameter of the outer cortical shell 0.16, of the inner 0.08, of the medullary shell 0.04; pores of the inner cortical shell 0.006, bars 0.003.

Editors' Notes
There was no illustration of this species in Haeckel (1887)
Haeckel listed Staurotholonium biquadratum the subgeneric name Staurotholodes, but did not include the subgeneric name in the species name.[comment from RadWorld database]

References:

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 years 1873-1876. 18: 1-1803. gs O


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Staurotholonium biquadratum compiled by the radiolaria@mikrotax project team viewed: 12-8-2026

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=262230 Go to Archive.is to create a permanent copy of this page - citation notes



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