Scalenodontoides is an extinct genus of traversodontidae, a family of herbivorous cynodonts. It lived during the Late Triassic in what is now South Africa. Its type species is Scalenodontoides macrodontes.[1] It was named in 1957 by A. W. Crompton and F. Ellenberger.[1] Arctotraversodon plemmyrodon was originally classified as a species of Scalenodontoides, but was given its own genus in 1992.[2] It is found in the Scalenodontoides Assemblage Zone of the Elliot Formation, which is named for it.[3] It is one of the geologically youngest traversodontids, alongside the putative traversodontid Boreogomphodon.[4] It is closely related to Exaeretodon and Siriusgnathus,[5] but is distinguished by the presence of a shelf-like expansion of its parietal called the nuchal table.[6] Though the largest known complete skull is only 248 millimetres (9.8 in) long, it may have been the largest non-mammaliaform cynodont, as an incomplete snout would have belonged to a specimen with an estimated skull length of 617 millimetres (24.3 in).[7]

Temporal range: Norian–Rhaetian
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Clade: Cynodontia
Family: Traversodontidae
Subfamily: Gomphodontosuchinae
Genus: Scalenodontoides
Type species
Scalenodontoides macrodontes
Crompton & Ellenberger, 1957