stylistic:tone, structural:scholar_edition, information:filtering, structural:expansion
Cladogram

There is an emerging consensus on green algal relationships, mainly based on molecular data. The Mesostigmatophyceae (including Spirotaenia, and Chlorokybophyceae) are at the base of charophytes (streptophytes). The cladograms below show consensus phylogenetic relationships based on plastid genomes and a new proposal for a third phylum of green plants based on analysis of nuclear genomes.

Mesostigmatophyceae s.l. in the cladograms corresponds to a clade of a narrower circumscription, Mesostigmatophyceae s.s., and a separate class Chlorokybophyceae, as used by AlgaeBase.

The Mesostigmatophyceae are not filamentous, but the other basal charophytes (streptophytes) are.