![]() ![]() The genus Rattus proper contains 64 extant species. Several other murine genera are sometimes considered part of Rattus: Lenothrix, Anonymomys, Sundamys, Kadarsanomys, Diplothrix, Margaretamys, Lenomys, Komodomys, Palawanomys, Bunomys, Nesoromys, Stenomys, Taeromys, Paruromys, Abditomys, Tryphomys, Limnomys, Tarsomys, Bullimus, Apomys, Millardia, Srilankamys, Niviventer, Maxomys, Leopoldamys, Berylmys, Mastomys, Myomys, Praomys, Hylomyscus, Heimyscus, Stochomys, Dephomys and Aethomys. The genus Rattus is a member of the giant subfamily Murinae. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (1.1 lb) in the wild. The group is generally known as the Old World rats or true rats and originated in Asia. The best-known Rattus species are the black rat ( R. ![]() ![]() However, the term rat can also be applied to rodent species outside of this genus. Rattus is a genus of muroid rodents, all typically called rats. ![]()
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