Tylodinidae
The Tylodinidae are a family of small, carnivorous sea snails, marine gastropod mollusks in the superfamily Conoidea. These snails are often referred to as tylodinids and are characterized by their unique shell morphology and predatory behavior. Their shells, typically ovate in shape, exhibit a distinct lip structure, with a thickened, internally toothed edge, and a columellar callus. These adaptations are thought to aid in prey capture and defense.
Common Names
While the scientific name Tylodinidae is most commonly used, these snails are sometimes referred to as tylodinids or cone snails. The term cone snails can be misleading as it generally refers to the Conidae family, but occasionally, Tylodinidae are included within this broader designation.
Characteristics
Tylodinidae are distinguished by several key features:
- Shell Morphology: Their shells are generally ovate, sometimes slightly elongate or conical. The aperture (opening) is wide and typically features a thickened lip, which often has internal teeth or ridges.
- Columellar Callus: The columella, the central axis of the shell, is usually covered by a thick callus. This callus may extend to cover the parietal wall, the wall of the aperture.
- Operculum: They possess a small, thin operculum, a structure that closes the shell opening when the animal retracts.
- Radula: The radula, a specialized feeding structure in gastropods, is equipped with sharp, hook-like teeth, which aid in capturing and consuming prey.
Environments
Tylodinidae inhabit a variety of marine environments, predominantly in tropical and subtropical regions. They are commonly found on rocky shores, coral reefs, and seagrass beds. The specific habitat preferences vary within the family, but generally, they favor areas with abundant prey populations.
References
To learn more about Tylodinidae, refer to the following reliable sources: