This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors. After copulation the females produce eggs which give. Just prior to reach the adult stage the worms manage it, that their host enters water, where the last larval stage leaves its host and reaches maturity after a last molt. As soon the larvae have entered a host (actively by penetration or by oral uptake as waiting stages = cysts), they start to grow and to take up food via their thin surface layer. The larvae reach only a length of 50–150 μm and possess at their mouth region a specific sucking and drilling system that allows them to penetrate into hosts that have entered aqueous biotopes. One genus, Nectonema, is marine, whereas the. All members are developmental parasites of aquatic or terrestrial invertebrates. While their adults, which may reach species-specific lengths of 5–10 cm up to 2 m and diameters of only 1–3 mm and which live mainly in freshwater, their larvae have a parasitic life style and therefore Nematomorpha are considered as parasitoids. Abstract The phylum Nematomorpha, the hairworms, occurs worldwide. Around 320 species are described worldwide. The name of this phylum of worldwide existing worms comes from Greek nematodes = threadlike, morphe= shape.
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