Prosthiostomum siphunculus is a species of flatworm belonging to the family Prosthiostomidae. It is a relatively common and well-studied species within its range, providing valuable insights into the diversity and ecology of marine flatworms.
Description & Characteristics
Prosthiostomum siphunculus is a relatively small flatworm, typically reaching a maximum size of around 10 millimeters in length. The body is elongated and flattened, with a distinct head region and a tapered tail. The dorsal surface of the body is usually a mottled brown or grayish color, often with darker markings or spots. This coloration helps the flatworm blend into the surrounding environment, providing camouflage from predators.
Habitat and Occurrence
Prosthiostomum siphunculus is a marine species, typically found in the intertidal zone and shallow subtidal areas. It prefers rocky shores and areas with abundant algae and invertebrates. The species has been recorded from various parts of the world, including the Mediterranean Sea, the Atlantic Ocean, and the Pacific Ocean. The species is particularly common in the infralittoral zone, the area between the low tide mark and the edge of the continental shelf. This zone is characterized by strong wave action and fluctuating salinity levels, making it a challenging habitat for many organisms.
Taxonomy
Prosthiostomum siphunculus belongs to the order Polycladida, a group of free-living flatworms with a distinctive branched gut system. It is further classified within the family Prosthiostomidae, which includes several other genera of polyclad flatworms.
Feeding
Prosthiostomum siphunculus is a carnivorous flatworm, feeding on a variety of smaller invertebrates. Its diet includes crustaceans, polychaetes, and other flatworms. The flatworm uses its pharynx, a muscular tube located in the ventral side of the body, to engulf and ingest prey. The digestive system of Prosthiostomum siphunculus is well-adapted for digesting these prey items, with a branched gut that extends throughout the body.
Image References