Cryptolarynx carinatus is a species of beetle of the family Curculionidae. It is found in South Africa, where it is only known from Rondebosch Common and Constantia in Cape Town.
Adults reach a length of about 2.7âÂÂ3 mm and have an integument black body, with the scapes and tarsi reddish.
Specimens were collected at the base of Oxalis purpurea plants, in the month of June.
The species name refers to the distinct proximal inner carina of the metatibiae in this species.