Fig. 7 in The Cross River Gorillas: A Distinct Subspecies, Gorilla gorilla diehli Matschie 1904

Fig. 7. Dorsal and ventral views of the calvaria of ZMBU 12799 from Basho, assigned by Matschie (1904) to G. g. gorilla. Note many of the characters typical of G. g. diehli (table 10). Multivariate analyses showed this specimen to group with the Cross River female gorillas.