Priapulomorpha
Priapulomorpha is a phylum of marine worms. These worms are typically found in soft sediments, such as sand and mud, in shallow to deep waters. The phylum contains approximately 20 species, which are divided into two orders: Priapulida and Halicryptida.
Common Names
Priapulomorpha are commonly known as "penis worms" due to their distinctive phallus-like appearance. They are also sometimes referred to as "priapulids."
Characteristics
Priapulomorpha are characterized by their elongated, cylindrical bodies, which are typically 1 to 20 centimeters long. They have a proboscis, a retractable, muscular structure at the anterior end of the body that is used for feeding. The proboscis is covered in spines and hooks that help the worm capture prey. Priapulomorpha lack distinct segmentation, although some species have a series of rings around their bodies. They also have a well-developed digestive system, but they lack a circulatory system. They breathe through their skin.
Environment
Priapulomorpha are found in marine environments worldwide, primarily in cold, temperate, and polar regions. They are typically found in soft sediments, such as sand and mud, from the intertidal zone to deep-sea trenches. They are often found in high densities in areas with high organic content.
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