Chorrillo Fm., ArgentinaNamed 2022

Maip

Type species Maip macrothorax

Lived
72 to 66 million years ago, Late Cretaceous
Diet
Carnivore
Length
about 9 m (30 ft)
Group
Theropods, Megaraptoridae
Found in
Argentina
Named by
Aranciaga Rolando et al. 2022

Size comparison

To scale

Where its fossils were found

The evidence

Today

1 find

70 million years ago

Map: C. R. Scotese, PALEOMAP

Field notes

About Maip

What it was like

Maip was a large, long-legged predator built for speed. Like other megaraptorids, it probably had a slender skull, long arms, and huge, curved claws on its hands. It grew to roughly 9 meters (30 feet) long, making it one of the largest megaraptorids known.

Its ribs were unusually large and robust for a theropod of its size, suggesting powerful chest muscles. This feature is reflected in its species name, Maip macrothorax, which refers to its wide chest.

Its world

Maip lived from about 72 to 66 million years ago, in the Late Cretaceous, in what is now Argentina. Its bones come from the Chorrillo Formation.

It shared its habitat with the plant-eating Nullotitan, and with the smaller theropods Kank and Isasicursor.

How it was found

Aranciaga Rolando and colleagues named Maip in 2022, based on an incomplete skeleton. Only one fossil find is known so far. Maip may be the largest megaraptorid discovered anywhere, and it is considered a close relative of other megaraptorids from South America, such as Megaraptor, Murusraptor, and Orkoraptor.

Lived alongside

Found in the same rock formations

Close relatives

Other members of Megaraptoridae

Sources: WikidataNamed in: A. M. Aranciaga Rolando, M. J. Motta, and F. L. AgnolĂ­n, M. Manabe, T. Tsuihiji, F. E. Novas. 2022. A large Megaraptoridae (Theropoda: Coelurosauria) from Upper Cretaceous (Maastrichtian) of Patagonia, Argentina. Scientific Reports 12:6318:1-29