anguimorpha

Infraorder Anguimorpha, consisting of:

Venom in the families Caenophidia, Anguimorpha, and Iguania evolved once, then the three families diverged.

Infraorder Anguimorpha (the monitors, Gila monster, and slow-worms)

Infraorder Anguimorpha (Platynota, Varanoidea)

Anguimorphs of the infraorder Anguimorpha include the anguids (alligator lizards, glass lizards, galliwasps and legless lizards).

Infraorder Anguimorpha (Platynota, Varanoidea): Monitor lizards, Gila monsters, Slow-worms and relatives.

Infraorder Anguimorpha - anguids (alligator lizards, glass lizards, galliwasps and legless lizards), monitor lizards, mosasaurs, and helodermatids (Gila monster and beaded lizard)

Venom has been known in the families Caenophidia, Anguimorpha, and Iguania, and has been shown to have evolved a single time along these lineages before the three families diverged, because all lineages share nine common toxins.

His master's thesis, the content of which was published in 1982, is a classic work on the paleontology and phylogeny of the lizard clade Anguimorpha that remains a core reference for morphological research on Xenosauridae and Anguidae in particular.

The Iguania were previously believed to form the sister group to the remainder of the Squamata based on morphological characteristics, but molecular information has placed Iguania well within the Squamata as sister taxa to the Anguimorpha and closely related to snakes.