Used references: The agaric is found on soil under several species of Nothofagus which are suspected of being its mycorrhizal host plant. According to the list of records, C. rubrobasalis has a wide ecological range but prefers, however, localities near the timberline or Fuegian habitats exposed to rather extreme climatic conditions. Pileus up to 6 cm diam., hemispherical or convex to obtusely umbonate, red-brown to dark, margin covered with conspicuous red-orange fibrils, dry. Lamellae yellow-brown turning rust brown. Stipe -7 x -1.5 cm, fusoid (rarely cylindric or clavate), basal portion densely covered with-orange fibrils from universal veil, dry. Flesh brownish. Odor and taste not distinctive. (Gamundi, I. & E. Horak, 1995. “Fungi of the Andean-Patagonian forests.” Buenos Aires: Vazquez Mazzini Editores, pg. 97)