Compsognathus

Compsognathus longipes was a small, bipedal theropod dinosaur that lived during the Late Jurassic period, approximately 150 million years ago. Roughly the size of a modern chicken, it was one of the smallest known non-avian dinosaurs. Its name, meaning 'elegant jaw,' refers to its delicate, narrow skull filled with small, sharp teeth, perfectly suited for its carnivorous diet. Fossil evidence, including the preserved remains of small lizards like Bavarisaurus within its abdominal cavity, confirms it was an agile predator of small vertebrates and insects. Physically, Compsognathus was characterized by a long, slender tail that acted as a counterbalance, long hind legs for swift running, and shorter forelimbs with two large, clawed digits and a smaller third digit. For many years, it was mistakenly thought to have only two digits per hand. The first specimen was discovered in the 1850s in the Solnhofen limestone of Bavaria, Germany, a formation renowned for its exceptionally preserved fossils, including Archaeopteryx. This historical proximity led to significant debate, as Compsognathus was one of the few theropods known that was comparable in size and anatomy to Archaeopteryx, making it a key specimen in early discussions about the evolutionary link between dinosaurs and birds. Its small size and well-preserved skeletons have provided invaluable insights into the diversity and physiology of small theropods that coexisted with the giant sauropods of the Jurassic.