Tubulaniformes
Tubulaniformes is an order of marine worms belonging to the phylum Nemertea, commonly known as ribbon worms or proboscis worms. These worms are characterized by their elongated, flattened bodies and a unique proboscis, a muscular tube used for capturing prey. Tubulaniformes are found in a wide range of marine environments, from shallow coastal waters to the deep sea.
Characteristics
Tubulaniformes exhibit several defining characteristics, including:
- Elongated, flattened body: Ribbon worms are typically long and thin, resembling a ribbon.
- Proboscis: A retractable, muscular tube located in the head region, used for capturing and paralyzing prey. The proboscis can be everted quickly and forcefully, often armed with a sharp stylet.
- Lack of a circulatory system: Tubulaniformes rely on diffusion for gas exchange and nutrient transport.
- Simple nervous system: They have a brain located in the head region and a network of nerve cords running along the body.
- Variety of colors: Tubulaniformes can be found in various colors, including brown, black, white, and even iridescent hues.
Environments
Tubulaniformes are widely distributed in marine environments around the world, inhabiting a variety of habitats, including:
- Intertidal zones: Found in rocky shores, sand flats, and tide pools.
- Subtidal zones: Common in shallow and deep sea environments.
- Coral reefs: Some species are associated with coral reefs.
- Deep sea: Many species inhabit the abyssal zone and other deep-sea habitats.
References
For further information on Tubulaniformes, consult the following resources: