Gymnopilus spinulifer has a cap which is convex and its ecology is saprotrophic, which refers to a process of chemoheterotrophic extracellular digestion involved in the processing of decayed organic matter.
cap is convex ecology is saprotrophic Saprotrophic nutrition /sprtrfk, -pro-/ or lysotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of decayed (dead or waste) organic matter. 
