PPT Slide
- Possess 2 pair of antennae: First pair is homologous to those of insects; second pair is unique to the crustaceans
- Second antennae have various functions, including sensory, locomotion or feeding.
- The head bears a pair of compound eyes and 3 pairs of mouthparts: a pair of mandibles, and 2 pairs of maxillae; used for food handling
- Trunk varies considerably among classes
- Primitively, the first three pairs of thoracic segments are maxillipeds; function in handling food
- Also, there are usually 5 pairs of appendages strengthened for walking (walking legs) and protection (chelipeds, pincer-like claws)