The gray tree rat (''Lenothrix canus'') is a species of

rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal specie ...

in the family

Muridae The Muridae, or murids, are either the largest or second-largest family of rodents and of mammals, containing approximately 870 species, including many species of mice, rats, and gerbils found naturally throughout Eurasia, Africa, and Australia. ...

. only species in the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

''Lenothrix''. It is found in forests in Indonesia and Malaysia. A common species, the

IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...

has rated it as being of "

least concern A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wil ...

Taxonomy

The gray tree rat was first described by the American zoologist Gerrit Smith Miller Jr. as ''Lenothrix canus'' in 1903. Molecular data suggests that it is closely related to the white-bellied rats ''

Niviventer ''Niviventer'' is a genus of rodent in the family Muridae endemic to Southeast Asia. It contains the following species: * Anderson's white-bellied rat, ''Niviventer andersoni'' * Brahma white-bellied rat, ''Niviventer brahma'' * '' Niviventer b ...

'', but is widely diverged from '' Maxomys'', and its phylogenetic affinities are unclear. It has many primitive morphological, cranial and dental features and may have diverged from the core murine lineage at an early stage.

Description

Head-and-body length is and tail length is . The fur is dense and woolly and free from spines. The head and back are grayish brown or gray and the underparts are white or buffish white. The tail is dark at the base and white near the tip. The hind feet are broad and have claws on all the digits.(

Distribution

The species is native to Indonesia and Malaysia. Its range includes peninsular Malaysia,

Penang Island Penang Island is the main constituent island of the Malaysian state of Penang. It is located off the western coast of Peninsular Malaysia by the Malacca Strait, with the Penang Strait separating the island from Seberang Perai on the mainla ...

and Tuangku Island, and the states of

Sabah Sabah () is a States and federal territories of Malaysia, state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah has land borders with the Malaysian state of Sarawak to the southwest and Indonesia's North Kalima ...

Sarawak Sarawak ( , ) is a States and federal territories of Malaysia, state of Malaysia. It is the largest among the 13 states, with an area almost equal to that of Peninsular Malaysia. Sarawak is located in East Malaysia in northwest Borneo, and is ...

and

Kalimantan Kalimantan (; ) is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area, and consists of the provinces of Central Kalimantan, East Kalimantan, North Kalimantan, South Kalimantan, and West Kalimantan. The non-Ind ...

in Borneo. That it has not been recorded from

Brunei Brunei, officially Brunei Darussalam, is a country in Southeast Asia, situated on the northern coast of the island of Borneo. Apart from its coastline on the South China Sea, it is completely surrounded by the Malaysian state of Sarawak, with ...

is probably the result of insufficient sampling rather than its absence from that state. It is an arboreal rodent, inhabiting all kinds of wooded habitats at altitudes of up to .

Ecology

The gray tree rat is

nocturnal Nocturnality is a ethology, behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatur ...

and spends most of its time in trees and bushes, feeding mainly on fruit.

Status

''L. canus'' is a common species, tolerant of disturbance to its habitat and able to live in secondary forest and rubber plantations. It is present in several protected areas including

Gunung Palung National Park Mount Palung National Park () lies on the island of Borneo, in the Indonesian province of West Kalimantan, north of Ketapang and east of Sukadana. History Mount Palung was first protected in 1937 as a forest nature reserve covering . In 1981, ...

and Mount Kinabalu National Park. No particular threats have been recognised and the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

has assessed its conservation status as being of "

References

{{Taxonbar, from=Q1543734 Old World rats and mice Rodents of Indonesia Rodents of Malaysia Mammals described in 1903 Taxonomy articles created by Polbot Taxa named by Gerrit Smith Miller Jr. Rodents of Borneo