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bdoroszko — Phaeodaria 2 by-nc-nd

Published: 2019-04-23 16:41:52 +0000 UTC; Views: 284; Favourites: 6; Downloads: 1
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Description Amazing geometry of God's creation, useful and beautiful

he Phaeodarea are a group of amoeboid  Cercozoa . They are traditionally considered radiolarians ,[1]  but in molecular trees do not appear to be close relatives of the other groups, and are instead placed among the Cercozoa .[2]  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.[3]

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 .

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