Figure 1From: Beyond memorization: an intermediate-level paleontology activity that integrates anatomy, ecology, and macroevolutionary theory using trilobites Trilobite biramous limb morphology. A) Close up of Middle Cambrian Olenoides serratus from Treatise on Invertebrate Paleontology, used with permission. B) Limb reconstruction from the Treatise on Invertebrate Paleontology, used with permission.Back to article page