Monera was first proposed as a separate group of organisms by Ernst Haeckel in 1866. He included a few eukaryotic organisms too along with bacteria in his Monera phylum.
- Later in Whittaker’s five kingdom classification, Monera was one of the kingdoms, which included all the prokaryotes such as bacteria, cyanobacteria, etc.
- Monera is the kingdom of prokaryotic organisms.
- Kingdom Monera includes non-nucleated unicellular organisms. They are prokaryotes.
- They have a cell wall. They have no membrane-bound organelles such as mitochondria, golgi complex. They lack a true nucleus.
- Instead, they have nucleoid, genetic material without a nuclear membrane.
- This kingdom includes bacteria, cyanophyceae (Blue-Green algae), nitrogen-fixing organisms etc.