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This list contains circa 2,700 species in 518 genera in the order Rodentia. [1] ... Sigmodon zanjonensis - montane cotton rat; Sigmodon fulviventer species group
The best-known rat species are the black rat (Rattus rattus) and the brown rat (Rattus norvegicus). This group, generally known as the Old World rats or true rats, originated in Asia. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (17 + 1 ⁄ 2 oz) in the wild. [2]
The best-known Rattus species are the black rat (R. rattus) and the brown rat (R. norvegicus). The group is generally known as the Old World rats or true rats and originated in Asia. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (1.1 lb) in the wild.
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A new species of Cricetidae was discovered in the mountains of Guerrero, Mexico. It was named honoring Dr. Robert Baker. It is known only from the type locality. [11] Oryzomys andersoni: Anderson's rice rat 2004 Bolivia A new species of rice rat was discovered in Bolivia. [12] Peromyscus schmidlyi: 2004 Mexico
This is a list of the largest rodents. Rank Common name Scientific name Status Maximum body mass [kg (lb)] Image Notes 1: Giant pacarana: Josephoartigasia monesi:
The brown rat (Rattus norvegicus), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat and Norwegian rat, is a widespread species of common rat. One of the largest muroids, it is a brown or grey rodent with a body length of up to 28 cm (11 in) long, and a tail slightly shorter than that. It weighs between 140 ...
The fancy rat (Rattus norvegicus domestica) is the domesticated form of Rattus norvegicus, the brown rat, [1] and the most common species of rat kept as a pet.The name fancy rat derives from the use of the adjective fancy for a hobby, also seen in "animal fancy", a hobby involving the appreciation, promotion, or breeding of pet or domestic animals.