DIVISION STREPTOPHYTA

The Streptophyta, the second branch of the Viridiplantae, is an immensely important and extraordinarily diversified group of organisms that contains all land plants (Embryophyta) as well as some important groups of algae (Charophyta). The Streptophyta can be divided into four main classes: Zygnematophyceae, Coleochaetophyceae, Charophyceae and Klebsormidiophyceae . Only the latter class harbours one photobiont species. The small classes Chlorokybophyceae, Mesostigmatophyceae and Spirotaenia appear to be sister to all streptophytes (Irisarri et al. 2021).