Phase-contrast micrographs of the sclerotized haptoral structures of Dactylogyrus spp. Arrows indicate the shape/type of the ventral bars. (a) D. romuli n. sp. (five radial type with long terminally frayed posterior arm), (b) D. recisus n. sp. (five radial type with posterior arm shorter than anterior one and with deeply frayed termination), (c) D. sandai n. sp. (cross-shaped type with posterior arm longitudinally split into several rays), (d) D. octopus n. sp. (inverted T-shaped type with pyriform anterior arm), (e) D. vukicae n. sp. (inverted T-shaped type with anterior arm reduced into several finger-like rays), (f) D. leptus n. sp. (poorly sclerotized, inverted T-shaped type with pointed arms of the same size).