Silesaurus

Silesaurus had a beak on its lower jaw, similar to later plant-eating dinosaurs like Lesothosaurus, but without the extra predentary bone.2

It had only 11 to 12 teeth in each dentary and maxilla, a low number compared to other early archosaurs.2

Its front limbs were long and slender, but weak, which scientists think is a special feature of this animal.1

Silesaurus had 25 presacral vertebrae, with 9 to 11 in the neck, and the last two back bones were fused to the hip bones.2

The first toe on its foot was reduced to a tiny metatarsal bone that probably did not have any toe bones.2

Silesaurus is the earliest known herbivore among the mesotarsal archosaurs, a group that includes dinosaurs and their relatives.2

Its fossils were found in a clay pit in Krasiejów, Poland, alongside remains of metoposaurs, phytosaurs, and aetosaurs.2