.7" Serrated, Megalosaurid (Marshosaurus) Tooth in Sandstone

This is a rare, .7" long Megalosaurid (Marshosaurus bicentesimus) tooth collected from the Morrison Formation. It comes from our partners' private quarry East of Dinosaur, Colorado. It has nice enamel and fine serrations, though there a couple of repaired cracks and the tip is missing, hence the reduced price.

There are two main characteristics that distinguish it from the much more frequently found Allosaurus teeth. First, the serrations on the mesial edge of the tooth extend less than half way down the length of the tooth. Secondly, there is little to no spiraling of the serrations as seen on Allosaurus teeth. Additionally, it's also fairly thin in cross-section and has a hooked profile.

There are three described Megalosaurs in the Morrison Formation; Marshosaurus, Stokesosaurus, and Torvosaurus. The tooth is too small to be Torvosaurus and Marshosaurus is the more common of the remaining two, which leads us to believe they are most likely Marshosaurus.