Complex sentence: Dipteran larvae have no jointed, "true legs", but some dipteran larvae, such as species of Simuliidae, Tabanidae and Vermileonidae, have prolegs adapted to hold onto a substrate in flowing water, host tissues or prey.
Split into simpler sentences: Dipteran larvae have no jointed, "true legs". Some dipteran larvae, such as species of Simuliidae, Tabanidae, and Vermileonidae have prolegs adapted to hold onto a substrate in flowing water, host tissues, or prey.