Abundance and distribution of nematodes of the genus ̉richuris Schrank, 1788 parasitizing domestic sheep (Ovis aries Linnaeus, 1758) were studied in Poltava, Kyiv and Zaporizhzhia Regions of Ukraine. Three species of ̉richuris were found, Trichuris skrjabini Baskakov, 1924, Trichuris îvis Abildgaard, 1795 and Trichuris globulosa Linstow, 1901. Trichuris îvis and T. skrjabini were more common (54.9 and 35.7 %), whereas ̉. globulosa was relatively rare (9.4 %) in the studied material. New species-specific and sex-related morphological characters and metric indices were reviewed as useful in better identifi cation of T. skrjabini, ̉. îvis and ̉. globulosa parasitizing sheep.