The discovery of Ulothrix is credited to Johann Heinrich Friedrich Link, a German botanist. He first described and named the genus Ulothrix in 1820 in his publication "Observationes in Ordines Plantarum Naturales".
Ulothrix is a genus of green algae commonly found in freshwater habitats. It is characterized by its unbranched, filamentous structure and its ability to reproduce both asexually and sexually. Link's discovery of Ulothrix was a significant contribution to our understanding of the diversity and evolution of algae.