Nemerteans - Regeneration in Invertebrates
Nemerteans as well possess remarkable regenerative ability, as even a small fragment can regenerate into a complete worm. Nemerteans particularly the larger species, have a marked tendency to fragment while irritated. Very frequently the proboscis becomes detached while irritated. The proboscis soon regenerates. Some species generally reproduce by fragmentation and even posterior sections of the body are able of regeneration.