[Margaret Pilkington]

The name simian categorises all the species in the ape/monkey group.
Most animals have a group name....cats are feline, dogs are canine, cows/cattle are bovine, bears are ursine, wolves are lupine, snakes are serpentine, foxes are vulpine, pigs are porcine, fish are piscine.....and there my knowledge runs out.
These are just the collective name for animals from the same group.