3.3" Long Allosaurus Caudal Vertebra With Stand - Wyoming

This is a 3.3" long, caudal (tail) vertebra of Allosaurus fragilis, collected from the Late Jurassic-aged Morrison Formation on a private ranch (Red Canyon Ranch) in Wyoming. Rock has been left within the neural canal of this vertebra.

It is accompanied by the pictured metal display stand.

There are several glue stabilized fractures through this vertebra, with a couple repairs that required minor gap fill restoration.

Allosaurus was a genus of carnosaurian theropod that lived from 156 to 145 million years ago during the Late Jurassic. Allosaurus species were predators with massive skulls, serrated teeth, and gaping jaws. This powerful and plentiful carnivore genus could grow more than 30 feet long. Their fossils are abundant in the Morrison Formation, leading some to suggest that Allosaurus species may have been pack hunters.


About The Two Medicine Formation

The Two Medicine Formation is a geographical formation in Central Montana and Southern Alberta, Canada. The formation is predominantly sandstone laid down by rivers and deltas during the Campanian Age of the Cretaceous, about 80-75 million years ago. Approximately two thousand feet thick on the western edge, it lies on top of the Virgelle Sandstone formation and under the Bearpaw Shale. It is located between the Front Range of the Rocky Mountains and the Sweetgrass Arch, a tectonic fold feature 40-90 miles east of the Front Range.

The Two Medicine is the same age as the Judith River Formation found further east. It was laid down further inland from the Western Interior Seaway, while the Judith River Formation was deposited along the coast. The Two Medicine contains much of the same dinosaur fauna, but fewer reptiles, amphibians, and aquatic fossils.

A view of the Two Medicine Formation quarry operated by Northwest Montana Fossils, where much of our Two Medicine dinosaur material has been found.
A view of the Two Medicine Formation quarry operated by Northwest Montana Fossils, where much of our Two Medicine dinosaur material has been found.
SOLD
DETAILS
SPECIES
Allosaurus fragilis
LOCATION
Red Canyon Ranch, Shell, Bighorn County, Wyoming
FORMATION
Morrison Formation
SIZE
3.3" long, 2.9" wide, 2.85" wide
CATEGORY
SUB CATEGORY
ITEM
#325124
GUARANTEE
We guarantee the authenticity of all of our specimens.