Runcinidae
Runcinidae is a family of small, predatory sea slugs that belong to the order Nudibranchia within the class Gastropoda. These marine invertebrates are commonly known as “runcinaceans” or “runcinid nudibranchs.” They are characterized by their elongated, flattened bodies and their lack of a shell.
Common Names
Runcinidae are commonly referred to as "runcinaceans" or "runcinid nudibranchs."
Characteristics
Runcinidae are distinguished by several key features:
- Elongated, flattened body: Their bodies are typically elongated and flattened, resembling a small, thin ribbon.
- Lack of shell: Runcinaceans lack a shell, which is a common feature among nudibranchs.
- Rhinophores: They possess two prominent sensory organs called rhinophores, which are located at the anterior end of the body and help them detect food and navigate.
- Cerata: Some species have cerata, which are small, finger-like projections on their backs that aid in respiration and digestion.
- Radula: Like other gastropods, runcinaceans possess a radula, a ribbon-like structure with rows of teeth used for scraping food.
Environments
Runcinidae inhabit various marine environments, including:
- Intertidal zones: Some species can be found in the intertidal zone, where they are exposed to air and waves.
- Subtidal zones: Others live in deeper subtidal zones, where they can be found on rocky reefs and seagrass beds.
References
For more information on Runcinidae, refer to the following sources: