Phaeodarea

Phaeodarea
"Phaeodaria" from Ernst Haeckel's Kunstformen der Natur, 1904
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Phylum: Cercozoa
Class: Thecofilosea
Subclass: Phaeodaria
Haeckel 1879
Orders
Diversity
400-500 species[1]
Synonyms[2]

Tripylea Hertwig 1879

Phaeodarea or Phaeodaria is a group of amoeboid cercozoan organisms. They are traditionally considered radiolarians,[3] but in molecular trees do not appear to be close relatives of the other groups, and are instead placed among the Cercozoa.[4] They are distinguished by the structure of their central capsule and by the presence of a phaeodium, an aggregate of waste particles within the cell.

The term "Radiozoa" has been used to refer to radiolaria when Phaeodarea is explicitly excluded.[5]

Phaeodarea produce hollow skeletons composed of amorphous silica and organic material, which rarely fossilize. The endoplasm is divided by a cape with three openings, of which one gives rise to feeding pseudopods, and the others let through bundles of microtubules that support the axopods. Unlike true radiolarians, there are no cross-bridges between them. They also lack symbiotic algae, generally living below the photic zone, and do not produce any strontium sulphate.

  1. ^ Cite error: The named reference HP Radiolaria and Phaeodaria was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Adl 2012 was invoked but never defined (see the help page).
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