Onuphidae
Onuphidae is a family of marine bristle worms, also known as onuphids, that belong to the order Eunicida. These worms are characterized by their long, slender bodies, often with a prominent proboscis (a fleshy, extensible snout) used for feeding. Onuphids are found in a variety of marine habitats, including sandy bottoms, rocky shores, and coral reefs, worldwide.
Common Names
Onuphidae are commonly known as "sandworms," "beardworms," or "trumpet worms," due to their appearance and feeding habits.
Characteristics
Onuphids exhibit several key features that distinguish them from other polychaete families:
- Proboscis: They have a well-developed proboscis that can be extended for capturing prey. The proboscis may bear jaws or teeth, and it is often lined with sensory tentacles.
- Parapodia: They possess parapodia (fleshy, paired appendages) along the body, which bear bristles (setae) used for locomotion and burrowing.
- Body Shape: The body is typically long and cylindrical, often tapering towards the posterior end.
- Size: Onuphid worms range in size from a few millimeters to over a meter in length.
Environments
Onuphids are found in a variety of marine environments, including:
- Intertidal Zones: They are common inhabitants of sandy beaches and rocky shores.
- Subtidal Zones: Onuphids can be found in deeper waters, often burrowing in sediments or associated with coral reefs.
- Estuaries: Some species tolerate brackish water conditions, making them common in estuaries.
References
For more detailed information about Onuphidae, you can refer to these reliable sources: