Ottotettix smaragdopoda gen. et sp. nov., a brachypterous katydid from the eastern Andean foothills of southern Ecuador, is described. It is moderately common in rainforest understory along creeks and in vales between 850 and 1300 m. The male's ultrasonic calling song, which is also described, is apparently performed only sporadically, and males seem also to use substrate-borne signals.