Figure 1

Location of the hot spring in the Los Nevados NNP and characteristics of Galdieria sp. USBA-GBX-832. (a) Location of site sampled in the Colombian Andes. (b) Photographs of the acidic hot spring A1. (c) Autotrophic culture of Galdieria sp. USBA-GBX-832. (d) Transmission electron micrograph of Galdieria sp. USBA-GBX-832.