Decliniidae is a family of beetles in the large suborder Polyphaga. It contains the single genus Declinia with two species,Declinia relicta Nikitsky, Lawrence, Kirejtshuk, Gratshev 1994and D. versicolor Sakai, Sato 1996, found in far eastern Russia 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