Rhizaria

The Rhizaria are a supergroup of mostly unicellular eukaryotes. A multicellular form has recently been described.

This supergroup was proposed by Cavalier-Smith in 2002. It has many species. They vary considerably in form, but for the most part they are amoeba-like with  pseudopods. Many produce shells or skeletons, which may be quite complex in structure. They make up the vast majority of protozoan fossils. Nearly all have mitochondria with folds.

 Groups 
There are three main groups of Rhizaria:

 Cercozoa – Various amoebae and flagellates, usually with pseudopods and common in soil
 Foraminifera – Amoeboids with reticulose pseudopods, common as marine benthos
 Radiolaria – Amoeboids with skeletons, common as marine plankton

 References 

Category:Eukaryotes