Cryptolarynx muellerae is a species of beetle of the family Curculionidae. It is found in South Africa, where it is only known from the type locality, near Vanrhynsdorp in the Western Cape Province.
Adults reach a length of about 2âÂÂ2.2 mm and have an integument black body, with the antennae, tibiae and tarsi reddish.
The species is named in honour of Ruth Müller, entomologist and collection manager at the Ditsong National Museum of Natural History in Pretoria.