The painted spiny pocket mouse (''Heteromys pictus'') 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 Heteromyidae. It is found in

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

and the northern tip of

Guatemala Guatemala, officially the Republic of Guatemala, is a country in Central America. It is bordered to the north and west by Mexico, to the northeast by Belize, to the east by Honduras, and to the southeast by El Salvador. It is hydrologically b ...

. It was formerly placed in the genus ''Liomys'', which is now recognized to be

paraphyletic Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In co ...

and has been subsumed into '' Heteromys''.

Description

The painted spiny pocket mouse is a medium-sized species and grows to a head and body length of about with a tail as long again, males being slightly larger than females. The pelage is composed of a mixture of stiff spines with soft, slender hairs, but because the hairs do not curl upward, the spines are the prominent feature of the coat. The upper parts of the head and body are reddish-brown and the underparts are white. The lateral line that separates the dorsal and ventral colors is some shade of dark or pale ochre. Immature pocket mice are grey and their coat consists mainly of soft hairs.

Distribution and habitat

The painted spiny pocket mouse is found in Mexico and Guatemala at altitudes of up to . Its range includes western Mexico, from the state of

Sonora Sonora (), officially Estado Libre y Soberano de Sonora (), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. The state is divided into Municipalities of Sonora, 72 ...

southwards to the state of

Chiapas Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the Political divisions of Mexico, 32 federal entities of Mexico. It comprises Municipalities of Chiapas, 124 municipalities and its capital and large ...

, the eastern Mexican state of

Veracruz Veracruz, formally Veracruz de Ignacio de la Llave, officially the Free and Sovereign State of Veracruz de Ignacio de la Llave, is one of the 31 states which, along with Mexico City, comprise the 32 Political divisions of Mexico, Federal Entit ...

, and the extreme northwestern corner of Guatemala. Its typical habitat is dry deciduous woodland or bushy scrubland and it occurs near streams in otherwise arid regions, often in places with cactus and acacia. In regions where their ranges overlap, it occurs in moister, lower habitats than the Mexican spiny pocket mouse (''Heteromys irroratus'').

Behavior

The painted spiny pocket mouse is nocturnal and solitary, with individuals just coming together for breeding. It lives in a burrow and engages in such activities as sand bathing, collecting seeds in its cheek pouches, caching food, scratching and caring for its coat. The diet mainly consists of seeds (large ones being preferred), green vegetation and small

invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...

s such as

spider Spiders (order (biology), order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude spider silk, silk. They are the largest order of arachnids and ran ...

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

s, crickets and

beetle Beetles are insects that form the Taxonomic rank, order Coleoptera (), in the superorder Holometabola. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 40 ...

s. Breeding takes place throughout most of the year, though few pregnant females were recorded between December and February and male mice had smaller testicles during that period. Litter sizes range from two to six and the average

gestation Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). It is typical for mammals, but also occurs for some non-mammals. Mammals during pregn ...

period is 25 days. The litter may stay together for one to two months but separates when there is a high level of aggression among the littermates.

Status

The painted spiny pocket mouse has a wide range and is common in parts of that range. 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 ...

lists 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 ...

" as, although its population trend is downward due to forest clearance, it is not declining at a rate so fast as to warrant a more threatened category.

References

{{Taxonbar, from=Q115757 Painted Spiny Pocket Mouse Rodents of Mexico Rodents of Central America Painted Spiny Pocket Mouse Painted Spiny Pocket Mouse Taxonomy articles created by Polbot