Planaxidae
Planaxidae is a family of marine gastropod mollusks commonly referred to as planaxid snails. The group comprises multiple genera, with Planaxis being the best known. Members of the family are generally small to medium in size and possess elongated, often glossy shells that show varying degrees of axial or spiral sculpture. The aperture is commonly elongated, and many species have a siphonal canal, reflecting their predatory or scavenging habits.
Planaxids occur in warm and temperate seas worldwide, with a concentration in tropical and subtropical regions.
Planaxidae snails are usually detritivores and scavengers, feeding on microalgae, diatoms, and organic matter. Some species
Reproduction varies among species, but many planaxids lay eggs in gelatinous capsules or masses. Larval development
Planaxidae is a recognized family of caenogastropod gastropods, although its precise placement has varied across classifications.
The family has a fossil record that helps trace its evolutionary history in marine settings.