Rhizaria

The Rhizaria are a supergroup of mostly unicellular eukaryotes.^[1][2] A multicellular form has recently been described.^[3]

Rhizaria Temporal range: Neoproterozoic - Recent Had'n Archean Proterozoic Pha.
Ammonia tepida (Foraminifera)
Scientific classification
Domain:	Eukaryota
Clade:	Diaphoretickes
Clade:	TSAR
Clade:	SAR
(unranked):	Rhizaria Cavalier-Smith, 2002
Phyla
Cercozoa Retaria Foraminifera Radiolaria

This supergroup was proposed by Cavalier-Smith in 2002.^[4] 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:^[5]

• 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