Macrogryphosaurus

Say it like this: “MAK-ro-GRIF-o-SOR-us”

Macrogryphosaurus gondwanicus

Macrogryphosaurus ate plants and walked on two legs. It lived in the Late Cretaceous. Bones have been found in Argentina.

Quiz me on Macrogryphosaurus

When: Late Cretaceous (Coniacian) · roughly 89.8 to 85.7 million years ago
Named in: 2007 · Calvo, J. O.; Porfiri, J. D.; Novas, F. E.
Hip height: Not established
Length: 5–6 m · 16–20 ft
Weight: 300 kg · 661 lb
Found in: Argentina · Sierra Barrosa
Food and walking: Herbivore · Two legs
Kind: beaked plant-eater · Ornithopod
Family branch: Elasmaria

The story in short

The genus Macrogryphosaurus dates to 2007, the year J. O. Calvo and colleagues described it.

Fossils referred to Macrogryphosaurus date to the Late Cretaceous (Coniacian), roughly 89.8 to 85.7 million years ago. Finds come from Argentina, including the Sierra Barrosa Formation. It was a herbivore and walked on two legs.

Published estimates put Macrogryphosaurus at a length near 5–6 m and a body mass around 300 kg.

On the family tree it sits in Elasmaria, among the ornithopod dinosaurs.

Close relatives

Anabisetia

Anabisetia saldiviai

Late Cretaceous (Turonian) · roughly 93.9 to 89.8 million years ago

Atlascopcosaurus

Atlascopcosaurus loadsi

Early Cretaceous (Barremian · Aptian · Albian) · roughly 125.8 to 100.5 million years ago

Chakisaurus

Chakisaurus nekul

Late Cretaceous (Cenomanian · Turonian) · roughly 100.5 to 89.8 million years ago