Bitrichia chodatii is a loricate chrysophyte (golden alga) in the order Chromulinales, forming a distinctive lorica with two or more projecting spines that anchor it to submerged surfaces or other algae. It inhabits oligotrophic, clear freshwater lakes, where it contributes to phytoplankton communities as a photosynthetic flagellate. Named in honor of botanist Robert Chodat, it is characteristic of cool, low-nutrient alpine and boreal lakes.