A male garter snake (Thamnophis) from a private terrarium was spontaneously and simultaneously infected with Chrysosporium queenslandicum and Geotrichum candidum. The autopsy revealed disseminated mycotic alterations in skin, lungs and liver. Chrysosporium queenslandicum grew well at 28 degrees C, the optimal temperature of the animal. This is the first description of a Chrysosporium queenslandicum infection in a garter snake.