The Opetiidae or flat-footed flies are members of a family of flies of the Order Diptera. The family contains only four extant species in one genus, Opetia, and the remaining taxa are known only from fossils.
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