Fig. 2From: Dimetrodon Is Not a Dinosaur: Using Tree Thinking to Understand the Ancient Relatives of Mammals and their EvolutionAn evolutionary tree or phylogeny depicting the patterns of shared common ancestry between lungfish, salamanders, crocodiles, turtles, cats, and humans. The connection points between branches or nodes represent the most recent common ancestors of the animals found on the branches they connect. See text for detailsBack to article page