Spongodictyon spongiosum

Taxonomy

Catalog entries: Dictyosoma spongiosum

Original description: Diese uberaus häufige Art ist bald rund, bald oval, etwas deprimirt, im Verhältnifs von 2 zu 3. Das äufsere schwammige Netzwerk geht ganz unregelmafsig in Zacken und Astchen aus, welche in Fäden nicht verlängert sind. Die innere Schale Nucleus ist fein gegittert und hängt mit dem äufsern Schwamm durch eine Anzahl ganz unregelmäfsiger Balken zusammen. Der Nucleus ist rund, auch bei länglichem äufseren Skelet, wahrscheinlich etwas deprimirt. Man übersieht an der obern oder untern Seite des Nucleus am Umfang einen circulären Balken, von welchem obere und untere Balken nach dem zweiten innersten Kern abgehen, so dafs beiderseits zwischen dem äufsern circulären Balken und dem innersten Kern ein Kreis von 9 Löchern erscheint. Die Löcher des innersten Kerns sind 2-3 mal kleiner, man übersieht daran 6 Löcher, wovon eines mitten zwischen den andern. Innerhalb der weichen Capsel, von welcher die Fäden auslaufen, ist zunachst ein heller Raum mit farblosen Zellen gefullt, die Körnchen enthalten. Darauf folgt eine rothe die Kernschale einschliefsende und verhüllende Masse. Diese besteht aus purpurrothen gröfsern und kleinern Pigmentkörnern, die gröfsten von 1/250"’ Durchmesser des weichenKrpers unter der äufseren Schale 1/20"’ Die gelben Zellen von 1/150"’ unter dem äufsern Skelet werden durch Jod gebunt.
[This very frequent species is circular, or oval, somewhat depressed, in proportion of 2 to 3. The external spongious network is bordered by very irregular teeth and small diverticules that are not extended as threads. The inner nucleus shell is finely latticed and linked to the external spongious tissue by some irregular beams. Nucleus round, also in elongated shells, probably a little depressed. On the upper and lower sides of the nucleus one can observe a circular beam from which upper and lower rods join both inner medullary shells so that a circle of 9 pores is located on each side, between the circular beam and the inner shells. The pores of the inner medullary shells are 2-3 times smaller, there are 6 pores, one at the centre of the others. Inside, the soft capsule from which originate some threads is full of transparent vacuoles near a luminous area and many corpuscles. A red mass envelops the nuclear shell. It is constituted by larger and smaller pigment granules, the larger with a dimension of 1/250"'. Dimensions of the soft nucleus under the external shell 1/20"'. Iodonophilous yellow vacuoles of a size of 1/150"' below the external envelope. (In German. Translated by J.P.C.)]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Spongodictyon

Spongodictyon spongiosum compiled by the radiolaria@mikrotax project team viewed: 21-6-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205484 Go to Archive.is to create a permanent copy of this page - citation notes

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