| abstract | Two new species of oribatid mites of the genus Xenillus (Oribatida, Liacaridae) are described from leaf litter in a rain forest in Bolivia. Xenillus pseudobolivianus sp. n. is similar to X. bolivianus and X. neonominatus in the morphology of lamellar cusp, length of bothridial and interlamellar setae and length and morphology of dorsal notogastral setae, but differs from both by the morphology of bothridial head and interlamellar and notogastral setae, the ornamentation of the notogaster, and the different length of some notogastral setae. Xenillus amboroensis sp. n. is similar to X. amazonensis, X. disjunctus, X. diversisetosus, X. fecundus, X. longipes, and X. ornatus in the morphology of bothridial seta, but differs from all by the morphology of lamellar cusp, the placement of the lamellar seta, and the different length of some notogastral setae. |