Cyanidiophyceae

Cyanidiophyceae is a class of unicellular red algae within subdivision Cyanidiophytina, and contain a single plastid, one to three mitochondria, a nucleus, a vacuole, and floridean starch. Pyrenoids are absent. Most are extremophiles inhabiting acid hot springs with a pH between 0,2 and 4 and temperatures up to 56 °C. They originated in extreme environments with high temperatures and low pH, which allowed them to occupy ecological niches without any competition.

Cyanidiaceae is a family of red algae, one of two families in the Division Cyanidiophytina.

Galdieria is a genus of red algae belonging to the order Galdieriales; family Galdieriaceae. It was first described by Italian botanist Aldo Merola in 1981 to differentiate it from species of Cyanidium.

Cyanidioschyzon merolae is a small (2μm), club-shaped, unicellular haploid red alga adapted to high sulfur acidic hot spring environments (pH 1.5, 45 °C). The cellular architecture of C. merolae is extremely simple, containing only a single chloroplast and a single mitochondrion and lacking a vacuole and cell wall. In addition, the cellular and organelle divisions can be synchronized. For these reasons, C. merolae is considered an excellent model system for study of cellular and organelle division processes, as well as biochemistry and structural biology. The organism's genome was the fir

Galdieriaceae is a family of red algae, one of two families in the order Cyanidiales.