- Cyanophyta, division Cyanophyta - prokaryotic organisms sometimes considered a class or phylum or subkingdom; coextensive with the Cyanophyceae: cyanobacteria (blue-green algae)
--1 is a kind of division
--1 is a member of division Eubacteria
--1 has members: class Cyanobacteria, Cyanophyceae, class Cyanophyceae