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Unformatted text preview: Sessile, shell made totally of calcium carbonate Planktonic larvae Filter feeders Largest penis/body size ratio in animal kingdom CLASS MALACOSTRACA Advanced crustaceans Ancestrally, have 19 body segments with a pair of limbs on each segment ORDER ISOPODA Isopods (rolly pollies), terrestrial crustaceans ORDER AMPHIPODA Some terrestrial, most aquatic Have ancestral 19 segments with 19 pairs of limbs No larval stage, brood eggs ORDER DECAPODA (LOBSTERS, SHRIMP, CRAYFISH, CRABS) Many larval stages Chelipeds (pincers) even in shrimp Boxing shrimp that kills with chelipeds Variable levels of tagmatization OMISSIONS Ex. 2 no nauplius larvae, instead observe live isopod Ex. 13 just draw limbs in lab book, dont tape to page. Draw on the page and tape the mouthparts to a paper towel On table, big barnacle=stalk barnacle, small barnacle=goose barnacle, acorn barnacles on display table...
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