Elachistocleis pearsei (common name: Colombian plump prog) is a species of frog in the Microhylidae family. It is found in the Caribbean drainage of Colombia and Panama and in northwest Venezuela. Elachistocleis pearsei was until recently considered to form monotypic genus Relictivomer, but in molecular phylogeny Elachistocleis pearsei is nested within other Elachistocleis, leading to resurrection of name Elachistocleis pearsei.