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| Description: Phylogeny of snakes, venomous helodermatid lizards, and their relatives. The most recent common ancestor of these venomous species is indicated. If venomousness is a homologous trait in snakes and Gila monsters, we should expect to see venom production in some of the other descendants of this common ancestor, such as the monitors and iguanas shown in the tree. Adapted from Fry et al. (2006). Picture Stats: Views: 2670 Filesize: 204.37kB Height: 899 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=5311 |