CATALOG OF ORIGINAL DESCRIPTIONS: Octodendron arachnoidale Hollande & Enjumet 1960

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 -> O -> Octodendron -> Octodendron arachnoidale
Other pages this level: O. arachnoidale, O. araucaria, O. arboretum, O. contortum, O. cubocentron, O. hamuliferum, O. nidum, O. pinetum, O. spathillatum, O. spirale, O. verticillatum

Octodendron arachnoidale

Citation: Octodendron arachnoidale Hollande & Enjumet 1960
Rank: species
Type specimens: pl.60, fig.7
Type repository: No information given
Described on page(s) : p.122
Family (traditional): Actinommidae
Family (modern): Centrocubidae

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Current identification:


Original Description
Chez O. arachnoïdale, la microsphère est nettement cubique. Le tissu spongieux est plus épais que dans l'espèce précédente. Il n'est d'ailleurs pas limité au côté interne par une plaque grillagée. Quatre à cinq verticilles de branches concourent à sa formation. Le tissu arachnoïdal est assez semblable à celui d' Octodendron hamuliferum. Il n'y a que huit spicules tricarénés, droits. Des spathilles ornent leur partie libre. Elles sont portées par des pédoncules droits et longs.
[Microsphere cubic. Spongious tissue thicker than in the preceding species (O. hamuliferum). This spongious tissue is not closed on the inner side by a lattice plate. 4 to 5 verticils of branches produce this spongious tissue. The spider web-shaped tissue is rather similar to that of O. hamuliferum. There are only 8 three-sided, radial, beams. Spathillae decorate their free ends. They are supported by straight and long pedonculae. (In French. Translated by J.P.C.)]

Microsphere 20µm. Spongious shell 250µm. Thickness of spongious tissue 60µm. Total length of radial beams 700µm. Length of free ends of beams 150-300µm. Verticil number 10. Thickness of the bars from the spongious tissue 1.5-2µm. Thickness of the bars from the arachnoidal tissue 1µm. Central capsule diameter 600µm.

Editors' Notes
Plankton, January 200, February 100, April 500m deep, December surface.

References:

Hollande, A. & Enjumet, M. (1960). Cytologie, evolution et systematique des Sphaeroides (Radiolaires). Archives du Museum National d'Histoire Naturelle, Paris. 7: 1-134. gs


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Octodendron arachnoidale compiled by the radiolaria@mikrotax project team viewed: 5-3-2021

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