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Subspecies of Canis lupus
''Canis lupus'' has 40 subspecies currently described, including the dingo, ''Canis lupus dingo'', and the domestic dog, ''Canis lupus familiaris'', and many subspecies of wolf throughout the Northern hemisphere. The nominate subspecies is ''Canis lupus lupus''.
''Canis lupus'' is assessed as Least Concern by the IUCN, as its relatively widespread range and stable population trend mean that the species, at global level, does not meet, or nearly meet, any of the criteria for the threatened categories. However, some local populations are classified as Endangered, and some subspecies are endangered or extinct.
Biological taxonomy is not fixed, and placement of taxa is reviewed as a result of new research. The current categorization of subspecies of ''Canis lupus'' is shown below. Also included are synonyms, which are now discarded duplicate or incorrect namings, or in the case of the domestic dog synonyms, old taxa referring to subspecies of domestic dog which, when the dog was declared a subspecies itself, had nowhere else to go. Common names are given but may vary, as they have no set meaning.
==Geographical variations==
Wolves show a great deal of polymorphism geographically, though they can interbreed. The Zoological Gardens of London for example once successfully managed to mate a male European wolf to an Indian female, resulting in a pup bearing an almost exact likeness to its sire.〔''The Living Age'', published by Littell, Son and Co., 1851〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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