The Glaucophyta is one of the three major lineages of photosynthetic eukaryotes. together with viridiplants and red algae. united in the presumed monophyletic supergroup Archaeplastida. Glaucophytes constitute a key algal lineage to investigate both the origin of primary plastids and the evolution of algae and plants. https://www.viziondigi.com/product-category/sunglasses/