Akodon is a genus consisting of South American grass mice. They mostly occur south of the Amazon Basin and along the Andes north to Venezuela, but are absent from much of the basin itself, the far south of the continent, and the lowlands west of the Andes. Akodon is one of the most species-rich genera of Neotropical rodents. Species of Akodon are known to inhabit a variety of habitats from tropical and tropical moist forests to altiplano and desert. Fossils are known from the late Pliocene onwards.
Sooretamys angouya, also known as the rat-headed rice rat, and Paraguayan rice rat, is a rodent species from South America. It is found in northeastern Argentina, southern Brazil and Paraguay in forested areas within the Atlantic Forest and cerrado. Since 2006, it has been classified as the only species in the genus Sooretamys; previously, it was included in the genus Oryzomys. Its taxonomic history has been complex, with the names Oryzomys angouya, Oryzomys buccinatus, and Oryzomys ratticeps in use for various parts of the species at different times. Some variation in its karyotype has been reported, with 2n = 80 to 82 and FN = 88 to 90.
The Bogotá grass mouse or Bogotá akodont, is a species of rodent in the family Cricetidae. It is found in the Andes eastern and central Colombia and northwestern Venezuela. Alavarado-Serrano and D'Elía (2013) have assigned the species to a new genus, Neomicroxus along with Neomicroxus latebricola.
Akodon boliviensis, also known as the Bolivian grass mouse or Bolivian akodont, is a species of rodent in the family Cricetidae. It is found in the Andes from southeastern Peru through Bolivia into northwestern Argentina.
Abrothrix hershkovitzi, also known as Hershkovitz's grass mouse or Hershkovitz's akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found only on some remote islands in southern Chile. It is named after American zoologist Philip Hershkovitz.
Abrothrix illuteus, also known as the gray akodont, gray grass mouse, or gray soft-haired mouse, is a species of small rodent in the genus Abrothrix of family Cricetidae. It is found only in northwestern Argentina.
Abrothrix lanosus, also known as the woolly grass mouse or woolly akodont, is a species of rodent in the family Cricetidae. It is found in southern Argentina and Chile. It was previously classified in the genus Akodon rather than Abrothrix.
Abrothrix longipilis, also known as the long-haired grass mouse or long-haired akodont, is a species of rodent in the family Cricetidae. It is found in central and southern Argentina and Chile. The southern Chilean Abrothrix sanborni may not be distinct from this species.
Abrothrix olivacea, also known as the olive grass mouse or olive akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found from northern Chile into southern Chile and Argentina, including the islands of Tierra del Fuego. It is prone to large swings in population size.
Abrothrix sanborni, also known as Sanborn's grass mouse or Sanborn's akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in southern Argentina and Chile, but may not be distinct from A. longipilis.
Akodon spegazzinii, also known as Spegazzini's akodont or Spegazzini's grass mouse, is a rodent in the genus Akodon found in northwestern Argentina. It occurs in grassland and forest at 400 to 3,500 m above sea level. After the species was first named in 1897, several other names were given to various populations now included in A. spegazzinii. They are now all recognized as part of a single, widespread and variable species. Akodon spegazzinii is related to Akodon boliviensis and other members of the A. boliviensis species group. It reproduces year-round. Because it is widely distributed and common, Akodon spegazzinii is listed as "least concern" on the IUCN Red List.
Chelemys megalonyx, also known as the large long-clawed mouse or large long-clawed akodont is a species of rodent in the genus Chelemys of family Cricetidae. It is endemic to central Chile.
Abrothrix andina, also known as the Andean Altiplano mouse or Andean akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in the Altiplano habitat of the Andes from central Peru through Bolivia, south to Argentina and Chile.
Abrothrix is a genus of rodent in the tribe Abrotrichini of family Cricetidae. It contains the following living species:
Abrothrix jelskii, also known as Jelski's Altiplano mouse, Jelski's grass mouse, or the ornate akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in the altiplano habitat of the Andes from central Peru through Bolivia into northwestern Argentina. Populations classified under A. jelskii include more than one species.
Irenomys tarsalis, also known as the Chilean climbing mouse, Chilean tree mouse, or long-footed irenomys, is a rodent found in Chile, from about 36° to 46°S, and in adjacent Argentina, mainly in forests. It is a large, long-tailed, soft-furred mouse characterized by grooved upper incisors and specialized molars with transverse ridges, divided by deep valleys, which are connected by a transverse ridge along the midline of the molars.
Oligoryzomys magellanicus, also known as the Patagonian colilargo and the Magellanic pygmy rice rat, is a species of rodent in the genus Oligoryzomys of the family Cricetidae. It is found in the southernmost parts of Argentina and Chile, including Tierra del Fuego and other outlying islands. Its karyotype has 2n = 54 and FNa = 66.
Akodon caenosus is a rodent in the genus Akodon found in northwestern Argentina and south-central Bolivia. Since its description in 1918, it has been alternatively classified as a separate species or a subspecies of Akodon lutescens. The species Akodon aliquantulus, described from some very small Argentine specimens in 1999, is now recognized as a synonym of A. caenosus.
Chelemys delfini, also known as the Magellanic long-clawed akodont, is a species of rodent in the genus Chelemys of family Cricetidae. It is endemic to the areas of Punta Arenas and Torres del Paine National Park in southern Chile, where it lives in the grassland and scrub of the Magellanic steppe. It has sometimes been considered a subspecies of C. megalonyx.
Abrotrichini, also known as the Andean clade or southern Andean clade, is a tribe of rodents in the subfamily Sigmodontinae. It includes about fifteen species in four genera, distributed in South America from southern Peru to southernmost South America, including the Patagonian steppes. The earliest known fossils are from the Pliocene of Argentina.
