Theropoda — the hollow-boned predators that outlasted every other dinosaur

When and where

Theropoda appeared around 231 million years ago in the Late Triassic. Early fossils come from Argentina's Ischigualasto Formation and southern Brazil. The clade spread to every continent, including Antarctica, and survived the mass extinction 66 million years ago in the form of birds. Living theropods — birds — now number roughly 11,000 species worldwide.

How we know

British paleontologist Harry Seeley grouped dinosaurs into Saurischia and Ornithischia in 1888, placing theropods within Saurischia alongside sauropodomorphs. The clade was formally recognized in its modern sense in the early twentieth century. Hollow limb bones and three functional toes on each foot define the anatomy. Early forms such as Eoraptor and Herrerasaurus show the ancestral body plan: bipedal, carnivorous, lightweight. By the Jurassic, coelurosaurs had evolved feathers; birds emerged from this lineage before 150 million years ago.

Source: https://en.wikipedia.org/wiki/Theropoda

What set it apart

Theropods are the only dinosaur lineage still alive. Their hollow bones cut weight without sacrificing strength, and the three-toed foot carried sharp claws. Early members were carnivorous, though some groups later shifted to herbivory or omnivory. Size ranged from the 0.6 metre Compsognathus to the 12 metre Tyrannosaurus rex. The subgroup Coelurosauria produced the maniraptorans, which gave rise to birds. Today the clade covers hummingbirds, ostriches, and every bird in between, making theropods the most diverse dinosaur lineage on Earth.

For collectors and classrooms

A theropod model is the natural starting point for carnivorous dinosaurs and the origin of birds. A Tyrannosaurus rex figure represents the clade's most famous member, while a Velociraptor model illustrates the feathered coelurosaur branch. Pair either with a bird skeleton chart to show how paleontologists trace the connection. A hand-painted Papo Tyrannosaurus rex is the usual starting point for most collections.

Pick up a detailed Papo Tyrannosaurus rex figure here.