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PHYLUM NEMATOMORPHA
- 2. Nematomorpha Etymology: from the Greek word “Nema” for thread “Morphe” for shape or form
- 3. GENERAL DESCRIPTION They are called Horsehair Worms, because they used to be found in horse watering troughs and they look like the hairs from a horses tail. typically tan to black in color
- 4. GENERAL DESCRIPTION They are long thin worms (1 to 3 mm diameter and 3 ft in length) bilaterally symmetrical, and vermiform
- 5. GENERAL DESCRIPTION Body possesses in a cuticle and longitudinal muscles. Has an intra-epidermal nervous system with an anterior nerve ring.
- 6. GENERAL DESCRIPTION has no circulatory, respiratory and excretory systems Its body possesses a through gut which is normally non-functional.
- 7. Nematomorphan larvae are parasitic, eating and absorbing their hosts’ body tissues in early stages. MODE OF NUTRITION They are parasites of invertebrates, though not necessarily aquatic ones.
- 8. MODE OF NUTRITION Feeding on nutrients from the bodily fluids. The larvae have a better developed digestive system than the adults.
- 9. Nematomorphans are dioecious and reproduce sexually REPRODUCTION Males have one or two testes which open to cloaca via sperm duct
- 10. REPRODUCTION Females may have pair of elongated ovaries, which open to the cloaca via semina receptacle A female may lay millions of eggs during breeding seasons.
- 11. Longitudinal muscles (no circular) underlie cuticle. Move with characteristic s-shaped movements. LOCOMOTION
- 12. HABITAT Nematomorphans are found in aquatic or occasionally terrestrial Either aquatic individuals themselves or within terrestrial host Habitat regions: Saltwater or marine Freshwater
- 13. CLASSIFICATION Class Nectonematoidea species are marine floating worms are found in coastal, marine, and open sea environments as adults are found as parasites in decapod crustaceans as larva a dorsal and ventral nerve cords
- 14. CLASSIFICATION Class Nectonematoidea Cuticle possesses swimming bristles They are known from the waters of Indonesia, Japan, New Zealand, the Northern Atlantic, and the Mediterranean. parasitize marine invertebrates Single reproductive gland (as an ovary or testes) that produces gametes only.
- 15. CLASSIFICATION Class Gordioida A dorsal and ventral nerve cords. Generally called hair worms. Only a ventral nerve cord. Are found in freshwater, most commonly along the banks of ponds and streams, and some are semi-aquatic and live in damp soil.
- 16. CLASSIFICATION Class Gordioida They are known from every continent, with the exception of Antarctica. The most common host are grasshoppers, crickets, and some beetles and cockroaches. However, some are found in humans, livestock, and pets. They utilize terrestrial arthropods and are free- living and aquatic as adults.