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The hierarchy of biological classification's eight major taxonomic ranks.A family contains one or more genera. Intermediate minor rankings are not shown. Genus (/ ˈ dʒ iː n ə s /; pl.: genera / ˈ dʒ ɛ n ər ə /) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. [1]
Forty percent of mammal species are rodents, and they inhabit every continent except Antarctica. This list contains circa 2,700 species in 518 genera in the order Rodentia. [ 1 ]
There are currently 1,258 genera, 161 families, 27 orders, and around 5,937 recognized living species of mammal. [1] Mammalian taxonomy is in constant flux as many new species are described and recategorized within their respective genera and families.
Genus Tarphonomus (new genus for 2 species formerly included in Upucerthia) Genus Thripadectes – treehunters; Genus Thripophaga – softtails; Genus Upucerthia – earthcreepers; Genus Xenerpestes – greytails; Genus Xenops; Genus Xiphocolaptes – woodcreepers; Genus Xiphorhynchus – woodcreepers (possibly polyphyletic) Family Grallariidae ...
Not included in either tribe is the genus Urocyon, which includes 2 species, mainly comprising the gray fox and believed to be basal to the family. Additionally, one genus in Canini, Dusicyon , was composed of two recently extinct species, with Dusicyon avus going extinct around 400 years ago and the Falkland Islands wolf going extinct in 1876.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
The basic ranks are species and genus. When an organism is given a species name it is assigned to a genus, and the genus name is part of the species name. The species name is also called a binomial, that is, a two-term name. For example, the zoological name for the human species is Homo sapiens. This is usually italicized in print or underlined ...
The former includes the five Panthera species tiger, lion, jaguar, leopard, and snow leopard, as well as the two Neofelis species clouded leopard and Sunda clouded leopard. [2] The subfamily Felinae includes 12 genera and 34 species, such as the bobcat , caracal , cheetah , cougar , ocelot , and common domestic cat.