S136 - Top Rare Acheroraptor temertyorum (Dromaeosaurid Raptor Theropod) Dinosaur Tooth - Lance Creek Fm Alokistocare See also Owens and Hammann

See also Owens and Hammann 1990 and Sepkoski 2002

Ornithocheirus simus

Ref: SWJ0060

It is characterized by its fineness of grain and variety of color

it can be any of the two genus of Sauropod mentioned above

S136 - Top Rare Acheroraptor temertyorum (Dromaeosaurid Raptor Theropod) Dinosaur Tooth - Lance Creek Fm Alokistocare See also Owens and HammannWhile 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