Oligosoma gracilicorpus, the narrow-bodied skink or narrow skink, is a species of skink in the family Scincidae. Only the holotype specimen (AIM Rep 31.1) is known, collected before 1955 on the North Island of New Zealand, probably in the vicinity of the Hokianga; it is possibly a juvenile. If so, this species could be the kawekaweau or kaweau (sometimes written koeau) of Māori lore, which by others is identified with a tuatara though its description does not match the tuatara well.(Hardy 1977)