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Squamata (/ s k w æ ˈ m eɪ t ə /, Latin squamatus, 'scaly, having scales') is the largest order of reptiles, comprising lizards and snakes. With over 12162 Species, it is also the second-largest order of extant (living) vertebrates, after the perciform fish.
- Lepidosauria
The Lepidosauria (/ ˌ l ɛ p ɪ d oʊ ˈ s ɔː r i ə /, from...
- Laterata
Main page; Contents; Current events; Random article; About...
- Scaled quail
The scaled quail (Callipepla squamata), also commonly called...
- Lepidosauria
- Evolution
- Evolution of Venom
- Taxonomy
Squamates are a monophyletic group that is a sister group to the tuatara. The squamates and tuatara together are a sister group to crocodiles and birds, the living archosaurs. Squamate fossils first appear in the early Jurassic, but a mitochondrial phylogeny suggests that they evolved in the late Permian. The evolutionary relationships within the s...
Recent research suggests that the evolutionary origin of venom lies deep in the squamate phylogeny. 60% of squamates are venomous Toxicofera. Venom in the families Caenophidia, Anguimorpha, and Iguania evolved once, then the three families diverged. All three lineages share nine common toxins. The fossil record shows that the divergence between ang...
Classically, the order is divided into three suborders: 1. Lacertilia, the lizards; 2. Serpentes, the snakes; 3. Amphisbaenia, the worm lizards. Of these, the lizards form a paraphyletic group. In newer classifications the name Sauriais used for reptiles and birds in general, and the Squamata are divided differently: 1. Suborder Iguania (the iguana...
Squamata (scaled reptiles) is the most diverse order of extant reptiles, comprised of the lizards and snakes and characterized a flexible jaw structure (movable quadrate bones) and having scales or shields rather than shells or secondary palates.
Squamata is the most diverse group of reptiles, including lizards and snakes. Learn about their evolution, systematics, fossil record, biogeography, and shared derived traits.
Aug 16, 2019 · Squamates are the most diverse group of reptiles, with about 7400 living species. They include lizards, snakes and worm lizards, and have skin shedding and jaw mobility as their main traits.
