Outline: a typical early armored dinosaur

Candeleros Fm., ArgentinaNamed 2022

Jakapil

"shield bearer"

Lived
113 to 110 million years ago, Early Cretaceous
Diet
Herbivore
Group
Early armored dinosaurs
Found in
Argentina
Named by
Riguetti et al. 2022

Where its fossils were found

The evidence

Today

1 find

110 million years ago

Map: C. R. Scotese, PALEOMAP

Field notes

About Jakapil

What it was like

Jakapil was a small armored plant eater that probably walked on its hind legs. Rows of bony plates protected its back, and it had a short, deep face with leaf-shaped teeth.

It belongs to an early branch of the armored dinosaurs, the group that also led to the stegosaurs and ankylosaurs. Most members of that early branch had died out long before, so Jakapil shows that some lasted far longer than scientists expected.

Its world

It lived about 113 to 110 million years ago, in the Early Cretaceous, in what is now Argentina. Its bones come from the Candeleros Formation, where giant sauropods such as Andesaurus and Limaysaurus lived, along with the huge predator Giganotosaurus and the small hunter Buitreraptor.

How it was found

Riguetti and colleagues named Jakapil in 2022 from one partial skeleton. Its name comes from a local language of the region, not from Greek or Latin.

Lived alongside

Found in the same rock formations

Close relatives

Other members of Thyreophoroidea

Sources: WikidataNamed in: F. J. Riguetti, S. ApesteguĂ­a, and X. Pereda-Suberbiola. 2022. A new Cretaceous thyreophoran from Patagonia supports a South American lineage of armoured dinosaurs. Scientific Reports 12:11621:1-12