Boreogomphodon is an extinct genus of traversodontid cynodonts from the Late Triassic of the eastern United States. Fossils have been found from the Turkey Branch Formation in Virginia and the Pekin Formation of North Carolina.
Boreogomphodon is an extinct genus of traversodontid cynodonts from the Late Triassic of the eastern United States. Fossils have been found from the Turkey Branch Formation in Virginia and the Pekin Formation of North Carolina.
==Description and history== Boreogomphodon jeffersoni was named in 1990. Its teeth and cranial bones are the most common tetrapod fossils in the Turkey Branch Formation. Remain assigned to B. jeffersoni are also known from the Pekin Formation of North Carolina. Boreogomphodon was distinguished from other traversodontids like the African Luangwa and the South American Traversodon on the basis of its postcanine teeth. Most traversodontids have lower postcanine teeth with two cusps, but Boreogomphodon was the first traversodontid found with three cusps on its lower postcanine teeth. There is a single cusp on the side of the upper postcanine facing the lip, while a flat surface extends outward from it. The traversodontid Arctotraversodon from the Wolfville Formation of Nova Scotia is similar to Boreogomphodon in that it has three cusps on its lower postcanine, but its postcanines are much wider than they are long relative to those of Boreogomphodon.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).