What is "eastern gorilla"

n. ''Gorilla beringei'', one of the two extant gorilla species, originally considered to be a subspecies.

The eastern gorilla (Gorilla beringei) is a species of the genus Gorilla and the largest living primate. At present, the species is subdivided into two subspecies. Grauer's gorilla, formerly known as the eastern lowland gorilla (G. b. graueri) is the most populous, at about 3,800 individuals. The mountain gorilla (G. b. beringei) has only about 880 individuals.