the type are called archaebactiera
Bacteria is generally considered to be the oldest taxonomic group due to their simple and ancient cellular structure, believed to have existed for billions of years.
bacteria!
Cyanobacteria are the first to appear in the fossil record.
Domain Bacteria contain the oldest known fossils of cells in bacterial cells.
probacteria
5500 they are ancient and an endagered species.
Single celled organisms like a bacteria and are some of Earth's oldest life forms.
The 34000-year-old bacteria that's still alive
The oldest fossils in the world are found in western Australia and are those of primitive bacteria. They are about 3.5 billion years old.
The domain Archaea covers the organisms considered to be the oldest on earth.They are commonly called archaebacteria but they are quite different from bacteria and are now more properly called archaea.
bacteria
The first types of cells were prokaryotes, which lack a nucleus and other membrane bound organelles.