Cross River gorilla

The Cross River gorilla ("Gorilla gorilla diehli") is a subspecies of the western gorilla ("Gorilla gorilla").
The Cross River gorilla was first described as a new species of Western gorilla by Paul Matschie, a mammalian taxonomist, in 1904.
According a study published by the American Museum of Natural History, the Cross River gorilla has been described as having smaller dentitions, smaller palates, smaller cranial vaults, and shorter skulls than other western gorillas.