The Origins of Monitor Lizards Was Never What We Thought — Ancient DNA Finally Revealed The Truth

In 2019, a research team published the complete genome of the Komodo dragon — the first full genome sequenced for any monitor lizard. What the genome revealed went far beyond the biology of the world's largest living reptile. It showed adaptations in cardiovascular function that allow Komodo dragons to sustain bursts of activity that should be impossible for a cold-blooded animal. It showed sensory gene expansions that explain the monitor lizard's extraordinary chemosensory abilities. And it placed the Komodo dragon — and all monitor lizards — in their correct position in the reptile family tree, confirming a relationship that earlier molecular data had suggested but never established with full genomic resolution: monitor lizards are the closest living relatives of snakes. Key Studies Referenced: Fry et al. (2005). Evidence for an ancient venom system in lizards from early Mesozoic snakes. Nature. Fry et al. (2009). A central role for venom in predation by Varanus komodoensis (Komodo Dragon). PNAS. Lind et al. (2019). Komodo dragon (Varanus komodoensis) genome reveals adaptations in the cardiovascular and chemosensory systems of the world's largest reptile. Nature Ecology & Evolution. Pyron et al. (2013). A phylogeny and revised classification of Squamata. BMC Evolutionary Biology. Conrad (2008). Phylogeny and systematics of Squamata. Bulletin of the American Museum of Natural History. Subscribe — new discoveries about lost species posted every few days