Chaetodermis
Chaetodermis is a genus of marine mollusks belonging to the family Chaetodermatidae within the order Caudofoveata. These worm-like animals are commonly known as “chaetoderms” or “spiny-skinned worms” due to their unique body structure.
Characteristics
Chaetodermis species are characterized by their elongated, cylindrical bodies, which can reach up to 10 cm in length. Their bodies are covered in numerous, minute, chitinous scales or spicules that give them a rough, spiny texture. They lack a shell and have a reduced head with a small mouth located at the anterior end. Their digestive system is simple and consists of a straight gut with no stomach or other specialized organs.
One of the most striking features of Chaetodermis is their unique method of locomotion. They move by using their muscular foot, which is located on the ventral side of the body. The foot is covered in a layer of cilia, which propel the animal through the sediment.
Environment
Chaetodermis species are primarily found in shallow to deep marine waters, typically inhabiting soft sediment bottoms. They are common in areas with high organic content, such as the intertidal zone and the continental shelf.
Distribution
The genus Chaetodermis is distributed globally, with species found in various oceans around the world.