Which statement is NOT an example of Crustacea?

Which statement is NOT an example of Crustacea?

• A. Lobster
• B. Crab
• C. Spider
• D. Shrimp

Answer: (C)

Crustacea encompasses a group of mostly aquatic arthropods characterized by features such as two pairs of antennae and many with biramous (forked) limbs, often with a hard exoskeleton and gills for underwater respiration. Lobster, crab, and shrimp are classic examples because they fit this crustacean body plan and lifestyle. A spider, on the other hand, is not a crustacean. It belongs to the arachnids, a separate arthropod lineage that has eight legs, no antennae, and specialized mouthparts called chelicerae. So, while lobsters, crabs, and shrimp are crustaceans, the spider is not, making it the correct choice for not being an example of Crustacea.

Crustacea encompasses a group of mostly aquatic arthropods characterized by features such as two pairs of antennae and many with biramous (forked) limbs, often with a hard exoskeleton and gills for underwater respiration. Lobster, crab, and shrimp are classic examples because they fit this crustacean body plan and lifestyle. A spider, on the other hand, is not a crustacean. It belongs to the arachnids, a separate arthropod lineage that has eight legs, no antennae, and specialized mouthparts called chelicerae. So, while lobsters, crabs, and shrimp are crustaceans, the spider is not, making it the correct choice for not being an example of Crustacea.