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Between the inner layer and the outer layer lies the dermis, which contains all the pigments and cells that make up the snake's distinguishing pattern and color. The epidermis, or outer layer, is formed of a substance called keratin, which in mammals is the same basic material that forms nails, claws, and hair. The snake's epidermis of keratin ...
Colubridae (/ k ə ˈ l uː b r ɪ d iː /, commonly known as colubrids / ˈ k ɒ lj ʊ b r ɪ d z /, from Latin: coluber, 'snake') is a family of snakes. With 249 genera, [2] it is the largest snake family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. [1]
Asian cobras, coral snakes, and American coral snakes also appear to be monophyletic, while African cobras do not. [12] [13] The type genus for the Elapidae was originally Elaps, but the group was moved to another family. In contrast to what is typical of botany, the family Elapidae was not renamed.
The following outline is provided as an overview of and topical guide to zoology: . Zoology – study of animals.Zoology, or "animal biology", is the branch of biology that relates to the animal kingdom, including the identification, structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.
Of these, the lizards form a paraphyletic group, [37] since the "lizards" are found in several distinct lineages, with snakes and amphisbaenians recovered as monophyletic groups nested within. Although studies of squamate relationships using molecular biology have found different relationships between some squamata lineagaes, all recent ...
The Boidae, commonly known as boas or boids, [3] are a family of nonvenomous snakes primarily found in the Americas, as well as Africa, Europe, Asia, and some Pacific islands. Boas include some of the world's largest snakes, with the green anaconda of South America being the heaviest and second-longest snake known; in general, adults are medium ...
The green and blue subgroups together form a clade. In biological phylogenetics , a clade (from Ancient Greek κλάδος (kládos) 'branch'), also known as a monophyletic group or natural group , [ 1 ] is a grouping of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a ...
Mambas are fast-moving, highly venomous snakes of the genus Dendroaspis (which literally means "tree asp") in the family Elapidae.Four extant species are recognised currently; three of those four species are essentially arboreal and green in colour, whereas the black mamba, Dendroaspis polylepis, is largely terrestrial and generally brown or grey in colour.