Nigronia is a genus of megalopterous insects (dark fishflies) in the family of Corydalidae. The typical size of species in the Nigronia genus are 20-30 millimeters.
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