A new species of Xenillus (Oribatida, Liacaridae)–X. meridaensissp. nov.–is described, based on adults collected from sweep samples in the cloud forest in Venezuela. The new species differs from its closely related species, X. capitatus, by its far larger body size, the morphology of the cusp of the lamella, the morphology of the lamellar seta, the surface of the notogaster, and the number of genital setae. An identification key to the Neotropical Xenillus species is given.