Leptalestes is an extinct genus of mammals in the infraclass Metatheria. It was described by B.M. Davis in 2007. A new species, L. toevsi, was described from the late Cretaceous period of the United States by John P. Hunter, Ronald E. Heinrich, and David B. Weishampel in 2010.
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