Mesochaetopterus
Mesochaetopterus is a genus of marine polychaete worms in the family Chaetopteridae. These worms are commonly known as “parchment worms” or “sand-mason worms” due to their unique tube-building behavior. They are found in a variety of marine environments, ranging from intertidal zones to deeper waters.
Characteristics
Mesochaetopterus species are characterized by their elongated, segmented bodies, typically measuring several centimeters in length. They possess a distinctive fan-shaped crown of tentacles, known as the "branchiae," which they use for respiration and food capture. The body is divided into three distinct regions: a cephalic region with a prominent prostomium, a middle region bearing numerous parapodia, and a posterior region ending in a pygidium.
One of the most notable features of Mesochaetopterus is their ability to construct intricate parchment-like tubes from a secreted mucous substance. These tubes are typically buried in the sediment, with the anterior end protruding, allowing the worm to extend its branchiae and capture food particles.
Environments
Mesochaetopterus species are typically found in soft sediments, including sand, mud, and silt. They are common inhabitants of intertidal zones, estuaries, and deeper waters. Some species are known to tolerate brackish water conditions. They play an important role in marine ecosystems as both predators and prey.
Species
The genus Mesochaetopterus includes several recognized species, including:
- Mesochaetopterus taylori
- Mesochaetopterus minutus
- Mesochaetopterus spinifer