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Chordata, Ambulacraria, and possibly Xenacoelomorpha are believed to form the superphylum Deuterostomia, although this has recently been called into doubt. [ 10 ] Chordata is the third-largest phylum of the animal kingdom (behind only the protostomal phyla Arthropoda and Mollusca ) and is also one of the most ancient taxons.
Combined with the five-kingdom model, this created a six-kingdom model, where the kingdom Monera is replaced by the kingdoms Bacteria and Archaea. [16] This six-kingdom model is commonly used in recent US high school biology textbooks, but has received criticism for compromising the current scientific consensus. [ 13 ]
There are seven main taxonomic ranks: kingdom, phylum or division, class, order, family, genus, and species. In addition, domain (proposed by Carl Woese ) is now widely used as a fundamental rank, although it is not mentioned in any of the nomenclature codes, and is a synonym for dominion ( Latin : dominium ), introduced by Moore in 1974.
The vertebrates make up the subphylum Vertebrata with some 65,000 species, by far the largest grouping in the phylum Chordata. The vertebrates include mammals , birds , amphibians , and various classes of fish and reptiles .
Size compared to a human. Ahvaytum is a small sauropodomorph, estimated to be 3 feet (0.91 m) long and 1 foot (0.30 m) tall. [1] Eoraptor, a close relative from Argentina, is known from a larger and more complete skeleton with a total body length of around 1.3 metres (4.3 ft). [5]
Weasels / ˈ w iː z əl z / are mammals of the genus Mustela of the family Mustelidae.The genus Mustela includes the least weasels, polecats, stoats, ferrets, and European mink. ...
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans.
Leatherback turtles are the only living representative of the Dermochelys family.: Scientific classification; Domain: Eukaryota: Kingdom: Animalia: Phylum: Chordata ...