Humidicutis Singer 1958

Key to species of Humidicutis worldwide, including un-named species 1. Occurring in the Austral-Pacific.......................................................................................................................................................15 1’. Occurring in the Americas..................................................................................................................................................................2 2. Pileus not orange-yellow, golden yellow or buff yellow....................................................................................................................4 2’. North American, pileus orange-yellow, golden yellow to buff yellow..............................................................................................3 3. Odour skunk-like when drying; mean spore length 7.3 µm................................................................................ Hum. auratocephala 3’. Odour not distinct; mean spores longer, 8–8.2 µm.............................................................................. Hum. marginata var. concolor 4. Occurring in North America; lamellae orange or pinkish orange......................................................................................................5 4’. Occurring in Central or South America or the Caribbean Basin........................................................................................................6 5. Pileus entirely or partly orange, without green tints.......................................................................... Hum. marginata var. marginata 5’. Pileus olive green, olive brown or brick red in centre with orange margin or entirely tawny olive; bright orange lamellae............................................................................................................................................................................ Hum. marginata var. olivacea 6. Occurring in Central America or Caribbean, pileus shades of vinaceous..........................................................................................7 6’. Occurring in South America; pileus not vinaceous but may be pale pink........................................................................................12 7. In Puerto Rico, Caribbean, Greater Antilles, rosey vinaceous or vinaceous......................................................................................8 7’. In Central America, Pileus darker, deep magenta or vinaceous brown..............................................................................................9 8. Pileus and lamellae entirely rosey vinaceous; basidiospores up to 10.4 µm long; in rain forest above 400 m asl; GenBank KF291146, KF291147; CFMR-PR-4715.............................................................................................................................................. Hum. sp. 1 8’. Pileus rosey vinaceous or vinaceous with a pale margin; lamellae white or pale pink; basidiospores