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For a different cladogram, based on fossil rather than genetic evidence, shows that one group of dinosaurs not only survived the impact but, with almost 10,000 living species, has outperformed both frogs and mammals.

We’re talking about moving an animal something like two, three or four nodes on the cladogram – not a big deal at all.

The highly simplified cladogram below depicts the relationships among most of the major iguanian groups.

Until there, here’s a highly simplified cladogram to whet your appetite.

Highly simplified cladogram showing one phylogenetic hypothesis proposed for crocodiles.