The morphology of new Neotropical oribatid mites Nothrus olszanowskii sp. nov. and N. pallidus sp. nov. from Ecuador is described and illustrated. The comparison with the most similar species: Nothrus jaliscoensis Palacios-Vargas et Iglesias, 1997, N. gracilis Hammer, 1961 and N. discifer Hammer, 1961 is included.