noun
- the anterior part of the head of certain invertebrates, especially annelid worms, located in front of the mouth
Usage: zoology; technical
Examples
- The prostomia of the earthworm contains sensory organs that help it navigate through soil.
- Marine biologists examined the prostomia to identify the species of polychaete worm.
- The prostomia bears tentacles and palps in many marine annelids.
- Damage to the prostomia can affect the worm’s ability to sense its environment.
- The prostomia is clearly visible under microscopic examination of the specimen.