Rhodocollybia in neotropical montane forests

Traditional concepts of Collybia (Agaricales) have included a variety of morphologically disparate taxa. Reapplication of some characters used in circumscribing Collybia s.l. suggests realignment of well-known North American and European species into three genera, viz. Collybia s.s, Rhodocollybia , and Gymnopus. Rhodocollybia is recognized here at generic rank based on morphological characteristics and phylogenetic signaling. Seven new species epithets under Rhodocollybia , and a new combination under Gymnopus , are proposed. A key to species of Rhodocollybia found in neotropical montane forests is provided.