Home - Taxonomy - Geography - Biodiversity - Literature - Purchase RepFocus Recent updates Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk). Latest update: December 31st, 2022. Taxonomy of the family Colubridae Bibliography of the genus Iguanognathus Biodiversity of the family Colubridae Genus Iguanognathus Iguana-jawed Snake Spatenzahnnatter Spadetandssnog 1898 Iguanognathus Boulenger (type species: Iguanognathus werneri Boulenger 1898) Contents: 1 species, which is endemic. Endemism: 0% 100% Distribution: As for the single species. Iguanognathus werneri Iguana-jawed Snake Spatenzahnnatter Spadetandssnog 1898 Iguanognathus werneri Boulenger Distribution: Indonesia (Sumatra).