Mastodonsaurus

Mastodonsaurus is a genus of herbivorous ornithopod dinosaur that lived during the Late Cretaceous period, approximately 70 million years ago. It is known from a single species, Mastodonsaurus albertensis, which was discovered in the Dinosaur Park Formation of Alberta, Canada. The genus name Mastodonsaurus is derived from the Greek words "mastodon," meaning "elephant," and "sauros," meaning "lizard," reflecting the large size and elephant-like features of the animal. The specific name albertensis refers to the province of Alberta, where the fossils were found.

Mastodonsaurus is one of the largest known ornithopods, with estimates suggesting it could reach lengths of up to 12 meters (39 feet) and weigh as much as 5 metric tons (5.5 short tons). It possessed a robust build, with a large, domed skull and a distinctive, elephant-like proboscis, which was likely used for grazing on low vegetation. The proboscis was supported by a series of bony rods and was lined with keratin, similar to the structure of modern elephants.

The fossil record of Mastodonsaurus includes numerous skull fragments, vertebrae, and limb bones, providing valuable insights into the anatomy and biology of this large dinosaur. Despite its size, Mastodonsaurus is relatively well-preserved, with many specimens exhibiting well-articulated skeletons. This has allowed paleontologists to study the dinosaur's growth patterns, muscle attachments, and overall body structure in detail.

Mastodonsaurus is an important member of the hadrosaurid family, which includes many of the most iconic dinosaurs from the Cretaceous period. Its discovery has contributed to our understanding of the diversity and evolution of ornithopod dinosaurs during the Late Cretaceous. The genus Mastodonsaurus serves as a reminder of the incredible array of life that existed on Earth millions of years ago and the ongoing efforts to uncover and study these ancient creatures.