Figure 3From: Beyond memorization: an intermediate-level paleontology activity that integrates anatomy, ecology, and macroevolutionary theory using trilobites Additional diagram and specimen photo used to convey range in appearance of basic anatomy. A) Diagram of the Ordovician trilobite, Isotelus from the Treatise on Invertebrate Paleontology, used with permission. B) Isotelus iowensis. University of Kansas Museum of Invertebrate Paleontology (KUMIP) 294608.Back to article page