Rallinids
Rallinids are a small, cosmopolitan group of marine invertebrates belonging to the phylum Mollusca. They are characterized by their shell, which is typically flattened and coiled in a planispiral manner, meaning the shell coils in a single plane. The aperture of the shell is often semicircular and lacks a columella. Rallinids are predominantly found in shallow, soft-bottom marine environments, burrowing into sand or mud. They are detritivores, feeding on organic matter found in the sediment.
This group is relatively poorly understood, with many species described based on shell morphology alone. Their