radiolaria - rads_cat - Polyplecta heptacantha radiolaria - rads_cat - Polyplecta heptacantha

CATALOG OF ORIGINAL DESCRIPTIONS: Polyplecta heptacantha 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 -> P -> Polyplecta -> Polyplecta heptacantha
Other pages this level: P. decacantha, P. enneacantha, P. heptacantha

Polyplecta heptacantha

Citation: Polyplecta heptacantha Haeckel 1887
Taxonomic rank: species
Described on page(s) : p.929
Type specimens: pl.91, fig.12
Type repository: No information given
Family (traditional): Plagiacanthidae
Family (modern): Plagiacanthidae

Current identification:


Original Description

Seven unequal spines divergent from one common central point, slender, slightly curved, three-sided prismatic. Four spines are much larger, twice to three times as long and as thick as the three smaller spines. One of the four larger spines is directed upwards (as "apical horn"), whilst the three others diverge downwards (as "basal feet"). Each of the four larger spines bears five to seven equidistant verticils of three divergent branches, the proximal of which are branched, the distal simple. The three smaller spines lie nearly horizontally, midway between the odd apical spine and the three basal spines, and in the same meridian planes with them; each bears one verticil of three divergent branches. All the branches are united by arachnoidal threads, composing a loose wickerwork with irregular, generally quadrangular meshes.

Length of the four larger spines 0.27 to 0.33, of the four smaller 0.1 to 0.14. [dimensions in mm]

Editors' Notes
see Polyplagia spetenaria Haeckel, 1887a.

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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Polyplecta heptacantha compiled by the radiolaria@mikrotax project team viewed: 15-7-2025

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