radiolaria - rads_cat - Cytocladus

CATALOG OF ORIGINAL DESCRIPTIONS: Cytocladus Schröder 1906

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 -> C -> Cytocladus
Other pages this level: << < Cyphocolpus, Cyphonium, Cyrtharia, Cyrtidosphaera, Cyrtocalpis, Cyrtocapsa, Cyrtocapsella, Cyrtocoris, Cyrtolarcus, Cyrtopenta, Cyrtopera, Cyrtophormis, Cyrtostephanus, Cystidium, Cystophormis, Cytocladus

Cytocladus gracilis Schroder 1907

Cytocladus gracillimus Haecker 1906

Cytocladus major Schroder 1907

Cytocladus spinosus Schroder 1906

Cytocladus tricladus Haecker 1908

Cytocladus

Citation: Cytocladus Schröder 1906
Rank: genus
Type species: Cytocladus gracilis Schroder 1907 [designated by Campbell,1954, p.D46]
Described on page(s) : 219
Family (traditional): Collodaria

Current identification:


Original Description
[pro parte] Die Gestalt des Gesamtorganismus ist kugelig, was durch die Form des Skeletts bedingt wird. Dieses besteht nämlich aus 12 Radialstacheln, die im Mittelpunkte der Skelettkugel zusammenstoßen und hier fest miteinander verschmolzen sind, wie es auch bei einigen Acanthometriden vorkommt. Von Zentrum strahlen die Radialstacheln gleichmäßig nach allen Seiten aus, wobei sie nahezu gleiche Abstände voneinander haben und gleiche Winkelmiteinander bilden. Indem sich all 12 Radialstacheln in gleicher Entfernung von Zentrum stark verästeln, so daß jeder von ihnen einem Baum mit flacher Krone gleicht, wird die kugelförmige Gestalt des Skeletts hervorgerufen.

Zwei der Radialstacheln, welche von den übrigen sonst durch nichts unterschieden sind, bilden eine Art Längsachse. Um jeden dieser beiden Stacheln, die ich Polstacheln nennen will, sind je fünf der übrigen Radialstacheln kranzförmig angeordnet, indem sie mit den Polarstacheln einen Winkel von ca. 60° bilden...

Die Stacheln von Cytocladus sind in Querschnitt kreisrund und vollkommen massiv. Sie zeichnen sich durch große Sprödigkeit aus.

Translation: The whole organism is globular, as induced by the skeleton. This one is mostly composed of 12 radial spines that are united in the centre of the globe where they are fused altogether, as it happens in Acanthometrids. From the centre, the spines regularly radiate in all directions, at regular distance and uniform angle from each other. All of the 12 radial spines are so strongly ramified at regular intervals from the centre, that each one looks like a tree with a flat top, resulting in the globular structure of the shell. Two radial spines, that are not otherwise different from the other ones, constitute some kind of long axis. Around each one of both these spines, that I’ll call “polar spines”, five of other spines are distributed in a corona, at an angle of ca. 60°...

The spines of Cytocladus are circular in cross-section and completely strong. They are very fragile. [In German. Translated by J.P.C.]

Editors' Notes
Cytocladus, C. gracilis and C. major were all introduced in Schröder (1906a) then redescribed in more detail in Schröder (1907 - which is sometimes cited as Schröder 1908). C. spinosus was described in  Schröder (1906b).

[Cytocladus Schröder, 1906a, p.454 is a Nomen Nudum. There is a subsequent reference to the nomen nudum in Haeckel, 1906.

In description the Cytocladus specimen referred to under "Nachtrag" is Cytocladus spinosus Schröder, 1906, in Schröder, 1906, Eine neue Cytocladus art (Cytrocladus spinosus). 
The author does not publish a true description of the genus, but a very detailed description of the 3 species which are grouped in this genus. The generic definition given here is composed of the characters that are similar in all three species. No general organization of the living part of the cell was given.]

References:

Schröder, O. (1906b). Neue Protozoen der deutschen Sudpolar-Expedition. Zoologischer Anzeiger. 30: 448-454. gs

Schroder, O (1906a). Eine neu Cytocladus art (Cytocladus spinosus). Zoologischer Anzeiger. 30: 587-590. gs

Schroder, O (1907). Neue Radiolarien (Cytocladus gracilis und C. major). Deutsche Sudpolar-Expedition 1901-1903, Zoologie. 9(1): 205-223. gs


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Cytocladus compiled by the radiolaria@mikrotax project team viewed: 6-12-2021

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