SEM micrographs A–F Nais badia sp. n. A lateral view of anterior body B–C hairs in VIII and VI D needles in VI E–F ventral chaetae in XIII and posterior. G–L Tubifex montanus G lateral view of the head H hairs in X I needles in II J–L ventral chaetae in IV, XIII and posterior. Scale bar: A 300 µm, B, D and I 5 µm, C, J and K 10 µm, E and L 20 µm, F 40 µm, G 100 µm, H 2 µm.