The Perote mouse (''Peromyscus bullatus''), or Perote deer mouse, is a species of

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

in the family

Cricetidae The Cricetidae are a family of rodents in the large and complex superfamily Muroidea. It includes true hamsters, voles, lemmings, muskrats, and New World rats and mice. At almost 608 species, it is the second-largest family of mammals, and h ...

. It is found only in

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

Description

The Perote mouse is the size of a small rat, with a total length of , including a hairy tail that, at , is typically longer than the animal's body. The mouse is tawny-ochre in colour, with creamy white underparts. The middle of the back is duskier than the rest of the animal, and the sides of head are grey. However, it can only be clearly distinguished from other mice in the genus ''Peromyscus'' by the fact that its ears are larger than its hindfeet by at least , and, in the skeleton, by inflated

auditory bulla The tympanic part of the temporal bone is a curved plate of bone lying below the squamous part of the temporal bone, in front of the mastoid process, and surrounding the external part of the ear canal. It originates as a separate bone (tympanic ...

e. These features may be related to an enhanced sense of hearing, allowing the mouse to readily detect predators.

Distribution

The Perote mouse is found only in the

Oriental Basin The Oriental Basin, also known as the Libres-Oriental Basin, Oriental-Serdán Basin or San Juan Plains (in Spanish, ''Llanos de San Juan'' or ''Cuenca de Libres-Oriental)'' is an endorheic basin in east-central Mexico. It covers an area of 4,958.60 ...

region of Mexico, including parts of western

Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...

, central Puebla and extreme eastern

Tlaxcala Tlaxcala (; , ; from nah, Tlaxcallān ), officially the Free and Sovereign State of Tlaxcala ( es, Estado Libre y Soberano de Tlaxcala), is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 60 municipaliti ...

. This is a relatively small region, between in elevation, near the city of Perote. It is dominated by grassland and arid scrub vegetation, with some patches of coniferous forest. Within the region, the mouse prefers areas with sandy soil and a few juniper or

yucca ''Yucca'' is a genus of perennial plant, perennial shrubs and trees in the family (biology), family Asparagaceae, subfamily Agavoideae. Its 40–50 species are notable for their Rosette (botany), rosettes of evergreen, tough, sword-shaped Leaf, ...

trees. The mouse's highly specific habitat requirements, limited distribution, and declining population all contribute to its critically endangered status.

References

{{Taxonbar, from=Q1767093 Peromyscus Endemic mammals of Mexico Tehuacán Valley matorral Rodents of North America Natural history of Puebla Natural history of Tlaxcala Natural history of Veracruz Mammals described in 1904 Critically endangered biota of Mexico Critically endangered fauna of North America Taxonomy articles created by Polbot Oriental Basin