Claustula is a fungal genus in the family Claustulaceae. It is monotypic, containing the single species Claustula fischeri, described in 1926 and found in New Zealand and Tasmania. In May 2016, it was one of two native New Zealand fungi was added to the IUCN Red List of Threatened Species as endangered.
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