Arthropods. Chapter 28. Arthropod characteristics. Segmented bodies Tough exoskeleton made of chitin Multiple shapes and textures Jointed appendages: legs and antennae. Arthropod evolution. Modern arthropods have fewer body segments and more specialized appendages.
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Fossil of a Trilobite, extinct class of Arthropod
stag beetle pincers
Insect molting case left on tree bark
Photo by Darlyne A. Murawski
Pheromone chemical: (E,Z)-6,11-Hexadecadienyl acetate
Image by Joseph Scheer