Notomenia
Notomenia is a genus of solenogasters, a group of small, worm-like, shell-less marine mollusks. They belong to the family Notomeniidae within the order Cavibelonia.
Characteristics:
Notomenia species are characterized by their elongated, cylindrical bodies covered in calcareous scales or spicules. These scales are embedded in the mantle and provide some protection. They possess a ventral groove, which houses the foot, used for locomotion. Notomenia lack a true shell, gills, and kidneys. Respiration occurs through the body surface. They are typically found in deep-sea environments.
Taxonomy:
- Kingdom: Animalia
- Phylum: Mollusca
- Class: Solenogastres
- Order: Cavibelonia
- Family: Notomeniidae
- Genus: Notomenia
The taxonomy of solenogasters, including Notomenia, has been subject to revisions based on morphological and molecular data. The exact number of species within the genus Notomenia may vary depending on the taxonomic authority.
Habitat and Distribution:
Notomenia species are primarily found in deep-sea habitats, inhabiting soft sediments on the ocean floor. Their distribution is global, with occurrences reported from various oceanic regions.