| abstract | Three new oribatid mite species - Ampullobates ecuadoriensis n. sp., Plenotocepheus neotropicus n. sp. and Monoschelobates hemileiformis n. sp. - are described from Ecuador. The three genera are also new for Ecuador. Ampullobates ecuadoriensis n. sp. is morphologically similar to Ampullobates nigriclavatus Grandjean, but differs from the latter by the morphology of the lamellar, exuvial and some epimeral setae, sensilli, the size of the interlamellar and exobothridial setae and the position of the genital setae. Plenotocepheus neotropicus n. sp. is morphologically similar to Plenotocepheus mollicoma Hammer, but differs by the length of interlamellar setae, morphology of sensilli, localization of lyrifissures iad and adanal setae ad3 and structure of leg setae u. Finally, Monoschelobates hemileiformis n. sp. is morphologically similar to Monoschelobates parvus Balogh and Mahunka, but shows differences in body size, length of the interlamellar, notogastral and anogenital setae and the presence of aggenital setae. |