Final answer:
The species fitting the description of being in the family Hominidae, subfamily Gorillinae, and exhibiting sexual dimorphism and knuckle-walking are gorillas.
Step-by-step explanation:
The species that belongs to the suborder Haplorrhini, infraorder anthropoids, parvorder catarrhine, super-family hominoidea, family hominidae, subfamily gorillinae, exhibits sexual dimorphism, and practices knuckle-walking are gorillas. Gorillas are part of the hominid family, which includes humans, chimpanzees, and orangutans as well. Members of the family Hominidae share a significant portion of their DNA, over 97% in common with gorillas, chimpanzees, and humans. Gorillas, in particular, are notable for their pronounced sexual dimorphism, with males generally being larger and more muscular than females. They are also known for their locomotion method, knuckle-walking, which describes walking on their knuckles for support when on the ground. This characteristic is shared by other members of the Hominidae family, such as chimpanzees, but gorillas are unique within this subfamily.