Pleurastrophyceae
 In taxonomy the Pleurastrophyceae are a class of green algae in the division Chlorophyta. It was created by Mattox and Stewart in 1984 containing four genera. More recent classifications tend to split the group. On the one hand Tetraselmis seems to be a sister to the so-called UTC clade (Chlorophyceae Trebouxiophyceae and Ulvophyceae) thus making it part of the (paraphyletic) Prasinophyceae.