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Phylum Arthropoda Class Crustacea. The Crabs, Shrimp, Lobsters, Crayfish, Barnacles, etc. Characteristics. Head, Thorax, Abdomen body plan Exoskeleton made of chitin Must molt (eccdysis) Two pairs of antennae 68,000 known species. Ostracod. Sea Flea. Amphipod. Isopod. Isopod.
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Phylum ArthropodaClass Crustacea The Crabs, Shrimp, Lobsters, Crayfish, Barnacles, etc.
Characteristics • Head, Thorax, Abdomen body plan • Exoskeleton made of chitin • Must molt (eccdysis) • Two pairs of antennae • 68,000 known species