Guyanagaster is a genus of fungi in the Physalacriaceae family. The genus is monotypic, containing the single wood-decaying sequestrate species Guyanagaster necrorhiza. The species, found in the neotropical rainforests of the Guiana Shield, was first described scientifically in 2010.
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