Isoteinon is a genus in the family Hesperiidae (tribe Erionotini). The genus is monotypic containing only Isoteinon lamprospilus, which was described by C. Felder and R. Felder in 1862. It is found in China and Japan.
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