Rhodoarrhenia is a genus of fungi in the family Bolbitiaceae. Most Rhodoarrhenia species have a tropical or subtropical distribution. The genus was circumscribed by mycologist Rolf Singer in 1963. He made R. pezizoidea the type species; in its taxonomic history, this fungus had been placed in the genera Merulius, Campanella, Rimbachia, and Arrhenia by various authors.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0