Gymnopilus novoguineensis belongs to a family of Cortinariaceae from order Agaricales, the order which is known as gilled mushrooms for their distinctive gills.
Family: Cortinariaceae Order: Agaricales The fungal order Agaricales, also known as gilled mushrooms (for their distinctive gills) or euagarics, contains some of the most familiar types of mushrooms. 
