Threatened species of Xanthophyceae

The taxonomy of this group is variable. Some place the class Xanthophyceae in the Chrysophyta, others in the Heterokontophyta, and yet others in its own phylum Xanthophyta.

1. Threatened species of Xanthophyta
2. Threatened species of Chrysophyta

1. Threatened species of Tetraplektron
2. Threatened species of Requejomyxa
3. Threatened species of Gaumiella