Mollusca
- Phylum: Mollusca
Overview
Phylum mollusca includes clams, snails, squid along with their shelled relatives, nautilids and ammonites. Primary characteristics include bilateral symmetry, a complete digestive tract with organ systems, and most have either an external or internal calcareous shell. Molluscs inhabit a range of environments from marine, freshwater, to terrestrial and have a variety of feeding modes including deposit feeders, filter feeders, herbivores, detritivores, and predators.
