Nigersaurus

Nigersaurus is a genus of herbivorous sauropod dinosaur that lived during the middle Cretaceous period, approximately 115 to 105 million years ago. Its fossils were first discovered in the Niger Republic in 1997 and were described in 1999.

Nigersaurus was a small sauropod dinosaur, measuring around 9 meters (30 feet) in length and weighing about 4 tons. It had a short neck and a small head with a wide mouth lined with numerous small, peg-like teeth. Its teeth were arranged in a tightly packed formation that allowed it to crop vegetation close to the ground, suggesting that it was a low browser. The jaws of Nigersaurus also show evidence of wear and breakage, suggesting that it may have processed tough plant material with a sideways motion of the jaws.

The discovery of Nigersaurus has provided valuable insights into the feeding habits and adaptations of early sauropod dinosaurs. Its unique jaw structure and dental arrangement suggest that it had a highly specialized feeding strategy that allowed it to exploit low-growing vegetation that other sauropods could not reach. 

Nigersaurus is a member of the Rebbachisauridae, a group of small to medium-sized sauropod dinosaurs that lived in Africa, South America, and Europe during the Cretaceous period. The rebbachisaurids are known for their unique skeletal features, including elongated neck vertebrae and specialized teeth, which suggest that they were highly specialized herbivores.