Pisanosaurus (Pisano’s lizard)cient horned face)
R. M. Casamiquela - 1967
Estimated 1-1.2 meters long
P. mertii (type)
Argentina - Ischigualasto Formation
Late Triassic, 228 million years ago
Pisanosaurus is a small, herbivorous dinosaur that lived during the Late Triassic period, about 228 million years ago. Its name, Pisanosaurus, means “Pisano’s lizard,” in honor of Juan A. Pisano, an Argentine paleontologist who discovered the first fossils in 1960.
Pisanosaurus was one of the earliest known ornithischian dinosaurs, a group that includes some of the most famous herbivorous dinosaurs like Stegosaurus and Triceratops. It was only about 1.2 meters (4 feet) long and weighed around 10 kilograms (22 pounds).
Pisanosaurus had a small head with a beak-like mouth, which it used to nip off plant material. Its teeth were small and pointed, and it had a sharp, curved claw on its first finger, which may have been used for defense or for grasping branches while feeding.
Pisanosaurus was also unique in that it had a relatively long neck for a dinosaur of its size, which may have helped it to reach vegetation that was higher up. Its tail was long and slender and may have helped with balance or communication.
Overall, Pisanosaurus is an important dinosaur because it helps us to understand the early evolution of ornithischian dinosaurs, and its discovery in Argentina has contributed to our understanding of the fossil record of South America during the Late Triassic period.