Sites

Radiolaria.org - English
URL: http://www.radiolaria.org/

Radiolaria are holoplanktonic protozoa widely distributed in the oceans. They occur throughout the water column from near surface to hundreds of meters depth. As with many planktonic organisms, their abundance in a geographical region is related to quality of the water mass, including such variables as temperature, salinity, productivity, and available nutrients.

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Species list of the Radiolaria - English
URL: http://www.biologie.uni-hamburg.de/b-online/radio/table.html

as prepared by Dr. Gerhard Keuck (1999)

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Interactive Glossary definition for 'Radiolaria' - English
URL: http://www.jbpub.com/oceanlink/interactive_glossary_showterm.cfm?term=Radiolaria

shown in filters: References and Indices

Radiolaria -- Microscopic, unicellular planktonic and benthic animals that possess siliceous (SiO2) tests

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Stratigraphic distribution of Mesozoic Radiolaria from the Tethys - English
URL: http://ip.nhm.org/datasets/rads/

These data include the year 2000 version of the Jurassic/Cretaceous Radiolaira database compiled by Taniel Danielian (Universite Pierre et Marie Curie - Paris 6) and Ken Johnson (Scripps Institution of Oceanography). The data are extracted from an Tethyan radiolarian atlas and biozonation scheme (Baumgartner et al., 1995) compiled by the Jurassic-Cretaceous Working Group of the International Association of Radiolarian Palaeontologists (INTERRAD).

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CLASSIFICATION AND DISTRIBUTION OF SOUTH ATLANTIC RECENT POLYCYSTINE RADIOLARIA - English
URL: http://palaeo-electronica.org/1998_2/boltovskoy/main.htm

shown in filters: Publications

Demetrio Boltovskoy

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Elliott Sharp and Orchestra Carbon - Radiolaria - English
URL: http://w1.311.telia.com/~u31113551/radiolaria.html

Radiolaria is an algorithmic composition modeled on biological paradigms of growth and reproduction. Among other operations within the score, the musicians may imitate and transform each others' parts in a way analogous to the replication process for many organisms such as "radiolaria," a kind of aquatic, single-celled protozoa.

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Radiolaria - Wikipedia - English
URL: http://www.wikipedia.org/wiki/Radiolaria

shown in filters: References and Indices

The radiolaria comprise three groups of amoeboids protists which form intricate mineral skeletons. They feed and move by means of axopods, and have a frothy ectoplasm often including symbiotic zooxanthellae, which is separated by a central capsule. Among the Polycystinea and Phaeodarea, the skeleton is made of silica and sometimes organic materials, but among the less common Acantharea it is made of strontium sulfate.

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IMAGE GALLERY: RADIOLARIA - English
URL: http://www.cladocera.de/protozoa/rhizopoda/imgal_radiolaria.html

In contrast to heliozoa, radiolaria exhibit a "central capsule" which separates the intra- from the extracapsular cytoplasm. Nucleus or nuclei are always located in the intracypsular cytoplasm. Most radiolaria possess a species' specific skeleton , mostly with star-like appearance, which is made out of silicic acid or strontium sulfate. Most radiolaria are found in the deeper planktonic strata of warm-water seas. Acantharia are found mainly in the upper plankton. Famous are the radiolarian sediments of Barbados.

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Ceratoikiscum herkommeri - a radiolaria - English
URL: http://www.flash.net/~mherk/herk_i.htm

A Radiolaria from the Arbuckle Mountains and Criner Hills Upper Devonian and Mississippian

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Fossil Record of the Radiolaria - English
URL: http://www.ucmp.berkeley.edu/protista/radiolaria/radfr.html

There are three distinct transitions in the evolution of Radiolaria, corresponding to three transitions in the geologic time scale, the Permo-Triassic, Cretaceous-Tertiary, and Paleogene-Neogene. Each phase includes extinction of families at the transition between periods, and a subsequent increase in the number of families as the new period progressed.

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Mesozoic Radiolaria - English
URL: http://www.utdallas.edu/~pujana/rads.htm

Radiolaria are the most abundant fossils in Mesozoic eugeoclinal terranes along the Circum-Pacific margin. They are often present and well-preserved where most other fossils are absent. During the last fifteen years radiolarian biostratigraphy has had a great impact on unraveling the stratigraphy and in turn the structure of many eugeoclinal terranes in Western North America and elsewhere in the world. In addition, it is now apparent from recent investigations in North America that Radiolaria can be utilized in paleobiogeographic reconstructions and to document the presence of Mesozoic displaced terranes.

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Radiolaria - English
URL: http://www.microscopy-uk.org.uk/mag/artjun99/bdradio.html

The Radiolaria are a group of unicellular organisms perhaps more commonly met with as prepared slides, rather than in life. As living creatures they can be encountered in the great oceans but more commonly in the Central Pacific. They were discovered in strange and beautiful forms by the research ship Challenger as a huge deposit of ooze on the ocean bed.

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NMNH - Research and Collections - Databases - English
URL: http://www.mnh.si.edu/rc/db/databases.html

Smithsonian Institution has a large collection of radiolarians, but shows no links or pictures on their web site.

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Radiolaria as tracers of ocean-climate history - English
URL: http://www.iisc.ernet.in/~currsci/nov10/articles14.htm

shown in filters: Publications

Radiolaria, siliceous protozoan marine planktons, though reported since long from rocks and recent oceanic sediments, have proved as potential tools in the last three decades in understanding geological history as well as in getting better insight into the oceanographic processes. This has particularly been possible with the availability of deep-sea cores as a result of Deep Sea Drilling Project.

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TMS (The Micropalaeontological Society) - English
URL: http://www.nhm.ac.uk/hosted_sites/tms/

The Silicofossil Group of the British Micropalaeontological Society is a multidisciplinary group with researchers in the fields of radiolarians, diatoms, sponge spicules and silicoflagellates. The group organizes frequent meetings discussing a wide range of topics concerning siliceous microfossils.

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The Rad Page - English
URL: http://radpage.univ-lyon1.fr/rad_en.html

Radiolarians? These siliceous microfossils are oceanic markers. The site provides general information on their contribution to the geological study of orogenic belts and, in particular, the Canadian Cordillera.

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RADWORLD MNHN PARIS - English
URL: http://www.mnhn.fr/mnhn/geo/radworld/radworldsite/radsearch.html

RadWorld is a relational database designed to provide information about the taxonomy, and geographic and stratigraphic distribution of all described genera and species of Radiolaria from the Paleozoic through the Cenozoic.

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Radiolaria - English
URL: http://www.ucl.ac.uk/GeolSci/micropal/radiolaria.html

Radiolaria are holoplanktonic protozoa and form part of the zooplankton, they are non-motile (except when flagella-bearing reproductive swarmers are produced) but contain buoyancy enhancing structures; they may be solitary or colonial. Formally they belong to the Phyllum Protista, Subphylum Sarcodina, Class Actinopoda, Subclass Radiolaria. The sister Subclass Acantharia have skeletons composed of strontium sulphate which is easily dissolved in seawater and are not preserved in the fossil record.

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Radiolaria - English
URL: http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.u

Spectacular objects for the microscope.

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Polycistina from Barbados - English
URL: http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.u

by Mike Samworth

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