Chapter Summary

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31.1 Protostomes Account for More Than Half of All Described Species

31.2 Many Lophotrochozoans Have Ciliated Feeding Structures or Life Stages

31.3 Ecdysozoans Grow by Shedding Their Cuticles

31.4 Arthropods Are the Most Abundant and Diverse Group of Animals

See Animation 31.1 for an overview of the protostomes.

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