S136 - Top Rare Acheroraptor temertyorum (Dromaeosaurid Raptor Theropod) Dinosaur Tooth - Lance Creek Fm

While Acheroraptor is primarily known from the Hell Creek Formation, some fragmentary remains, including teeth, have been found in the geologically similar Lance Formation from the same time period. These fossils are from the late Maastrichtian age (around 66 million years ago). 

Identifying Acheroraptor teeth can be challenging, but they may have subtle apicobasal ridges and different-sized serrations on the anterior versus posterior sides of the crown. 

Key details about Acheroraptor teeth in the Lance Formation:

Geological context: Fossils from the Hell Creek and Lance Formations are from the same late Maastrichtian age and often include similar faunas.

Age: The fossils date to approximately 66 million years ago.

Identification: Acheroraptor teeth are small theropod teeth that can have specific characteristics, though they are hard to distinguish from other small theropod teeth in the formation.

Diagnostic features:
Serrations: The anterior (front) and posterior (back) carinae (edges) can have different-sized serrations.

Ridges: The crown may have apicobasal ridges, which run from the tip towards the base.
Identification challenges: The limited and fragmentary nature of the teeth can make identification difficult. It is also possible for other dromaeosaurids or similar-toothed theropods to be present. 

The tooth comes stored in a display box.