†family Crythiosauridae Vanzolini 1951 (worm lizard)
Reptilia - Squamata - Crythiosauridae
Alternative spelling: Crythiosaurinae
Full reference: P. E. Vanzolini. 1951. A systematic arrangement of the Family Amphisbaenidae (Sauria). Herpetologica 7(3):113-123
Parent taxon: Amphisbaenia according to O. W. M. Kuhn 1966
See also Vanzolini 1951
Sister taxa: Amphisbaeniformes, Amphisbaenoidea, Chthonophidae, Glyptosaurus walbeckensis, Hodzhakulia, Hyporhinidae, Oligodontosauridae, Polyodontobaenidae, Rhineuroidea
Subtaxa: Crythiosaurus Platyrhachis
Type: Crythiosaurus
Ecology: fossorial insectivore
Distribution: found only at Ulaan Khongil (Oligocene of Mongolia)