Hypnale is a genus of venomous pitvipers endemic to Sri Lanka and southwestern India. Three monotypic species are currently recognized (no subspecies). All members have more or less upturned snouts that produce a hump-nosed effect.
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