Domain: Prokarya

Anabaena is in the prokarya domain because it has no true nucleus and no membrane bound organelles.

Kingdom: BacteriaImage courtesy of UW-Madison Botany and Mike Clayton

Phylum: Cyanobacteria

This is the phylum of bacteria that acquire their energy through photosynthesis, and are often called the blue-green algae.

Order: Nostocales

Anabaena fall into this category because they have trichomes and lack endospores and exospores.

Family: Nostocaceae

This is the category of blue-green algae that form heterocysts and have unbranched trichomes.

Genus: Anabaena

Image courtesy of Mike Clayton and UW-Madison Botany The Anabaena genus is known for its intercalary heterocysts and isolated or amorphous filaments.


A Strmatolite from early cyanobacteria.



Here are some phylogenetic trees that show where Anabaena fits in with the bacteria, and where it fits in with its own family.






Now that you know where Anabaena fits with regards to other organisms, why don't you check out where it fits in the world around us! Or, return to the main page here.