Mesostigmatophyceae

The Mesostigmatophyceae is a type of basal green algae. They are usually found in fresh water. Mesostigmatophyceae can be be a sister group to all green algae, or as sister to all Streptophyta.
Categorization.
There are many ways to place the Mesostigmatophyceae into a category. One popular way is to have it only one genus, which is "Mesostigma". A different way to do it is two have two clades; "Chlorokybus" and "Spirotaenia". It is also common to put "Chlorokybus" in a different class as Chlorokybophyceae. Below is a common way to sort the categories.