Anguimorpha
The Anguimorpha is a suborder of squamates. The group was named by Fürbringer in 1900 to include all autarchoglossans closer to "Varanus" and "Anguis" than "Scincus". These lizards, along with iguanians and snakes, constitute the proposed "venom clade" Toxicofera of all venomous reptiles. The oldest definitive record of the group is "Dorsetisaurus" from the Late Jurassic of Europe and North America. Families. Anguidae. There are 9 genera found within the Anguidae family. They are characterized by being heavily armored with non-overlapping scales, and almost all having well-developed ventrolateral folds (excluding "Anguis"). Anguidae members can, however, be somewhat  difficult to identify in their family, as members can be limbed or limbless, and can be both viviparous and oviparous. Anguidae members have pterygoid teeth. Many members of this family have tail autotomy. Anniellidae. There is only one genus within the Anniellidae family, comprising 6 species of American legless lizards. They are characterized as having no limbs, and can be found in California and Baja California. They have wedge-shaped heads and a countersunk jaw that allows them to bury themselves in sand or loose soil, which they can drink water from if the soil has a water quantity greater  than 7%. They give live birth and usually have two offspring. Diploglossidae. There are three genera in the Diploglossidae family. They are characterized by having very long, automatized tails, small and well-developed limbs, and no ventrolateral fold. They do have bicuspid posterior teeth. They give both live birth, and lay clutches, according to the genus. Xenosauridae. There is only one genus, with 6 species, found in the Xenosauridae family. This family is both dorsally and ventrally covered in knob-like scales. Their tail is about 1.2 times the length of their body. They give live birth, with a litter  usually consisting of two offspring, although they can have up to eight. Gestation takes eleven to twelve months. They are primarily insectivores. Helodermatidae. The family Helodermatidae (beaded lizards) has only one genus with 5 species: the Gila monster (Heloderma Suspectum), "Heloderma exasperatum", "Heloderma horridum", "Heloderma Alvarezi" and "Heloderma Charlesbogerti". This family is the only known family of lizards that have well-developed venom glands. In addition, they have non-automated tails (short in Gila monsters, while considerably larger the rest of the genus) in which they store fat. They have somewhat tubercular scales both dorsally and laterally, with their ventral  scales being smooth, and being larger than the dorsal and lateral scales while much of their body is covered by osteoderms. They are oviparous, with clutch sizes averaging about 6 eggs per clutch. These lizards have a pectoral girdle, meaning that they must push their swallowed prey past it in order to eat. Despite this limitation, these lizards have been observed eating prey up to 33% of their body weight. Shinisauridae. The family of Shinisauridae is only made up of one species, "Shinisaurus crocodilurus," the Chinese crocodile lizard. This species is semiaquatic, found in forests along streams. These lizards can  hold their breath underwater for up to thirty minutes at a time. . Found in southern China, this species is viviparous, with litters ranging from 2-7 individuals. This species has well-developed limbs and has a tail that is around 1.2 times the length of its body. Tail autonomy is not present in these lizards. Lanthanotidae. The family Lanthanotidae consists of a single species, the earless monitor lizard ("Lanthanotus borneensis)". This species has thick skin, which is covered by small, rounded scales that appear in rows. The main defining feature that distinguishes this species from other monitors is its lack  of a parietal eye and the lack of a hemibaculum. The species is presumed to be semiaquatic, but little is known about its wild habits, as most information and study comes from captive individuals. It is only found on a single island of off the coast of Singapore. Varanidae. The Varanidae are a family of carnivorous and frugivorous monitor lizards, which contains one extant genus ("Varanus") with 73 species, including the Komodo dragon. They can be characterized by their thick skin and small, rounded scales. The ventral scales are slightly larger than the dorsal scales. They have a parietal eye  and a hemibaculum. This completely oviparous family has a clutch size that correlates with the body size. No members of this family exhibit parental care. They also have limbs that are relatively small for their body size. The family is also broken up into 9 distinct morphological subgroups. Some species of Varanidae, such as the "Varanus komodoensis", or the Komodo Dragon, have been found to produce venom. Previous research has suggested that pathogenic bacteria may play an integral role in the predatory ecology of the Komodo Dragon, however, the inter-individual variability of oral flora in Komodo Dragons makes this  unlikely. Using Magnetic Resonance Imaging (MRI), a study in 2008 concluded that "V. komodoensis" have well-developed mandibular venom glands and that they use this venom to compensate for a weak bite force. Classification. The following cladogram is based on the optimal results found by Reeder "et al." (2015) in the largest-scale morphological+molecular phylogenetic analysis of extant and fossil squamates as of that year: