Anatomy analysis suggests new dinosaur family tree

Proposal would radically alter century-old groupings

new dino evolutionary tree

NEW WAY TO RELATE  The dinosaur evolutionary tree just got a makeover. One outcome of the proposed rearrangement is that meat-eating evolved twice in dinosaurs (in groups represented by Tyrannosaurus rex, bottom middle, and Staurikosaurus, right), as did traits associated with plant-eating (groups represented by Brontosaurus, left, and Triceratops, top middle). 

Clockwise from left: Matt Wedel/Wikimedia Commons (CC BY 4.0); Allie_Caulfield/Wikimedia Commons (CC BY-SA 3.0); Kabacchi/Wikimedia Commons (CC By 2.0); David Monniaux/Wikimedia Commons (CC By-SA 2.0 FR)

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