Photomicrographs of Coomansus parvus (de Man, 1880) Jairajpuri & Khan, 1977. Female specimens from populations collected from riverbanks of the rivers Lopushnitsa (A, B, E–G, M), Vedena (C, D, H, I, K, L), and Arda (J): A entire body B–D, G anterior region (amphid opening arrowed in G) E, F, I reproductive system (E anterior genital branch F, I vulval region showing pars refringens vaginae) H, J–M tail (cuticle striation arrowed in H; caudal pores arrowed in J and K). Scale bars: 200 µm (A); 20 µm (B–D, F–I, M); 50 µm (E, J–L).