Akodon

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Akodon
Temporal range: Late Pliocene - Recent
Akodon albiventer 50864945.jpg
Akodon albiventer
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Tribe: Akodontini
Genus: Akodon
Meyen, 1833
Type species
Akodon boliviensis
Meyen, 1833
Species

See text

Synonyms [1]
  • AcodonAgassiz, 1846
  • AxodonGiebel, 1855
  • Chalcomys Thomas, 1916
  • HypsimysThomas, 1918
  • MicroxusThomas, 1909
  • PlectomysBorchert and Hansen, 1983 ( nomen nudum )

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. [2]

Contents

Taxonomy

Akodon is the largest genus in the tribe Akodontini. Three of its synonymsChalcomys, Hypsimys, and particularly Microxus—have sometimes been regarded as distinct genera. Neomicroxus was separated in 2013. Previously associated with Akodon, the genera Abrothrix , Deltamys , Necromys , Thalpomys , and Thaptomys are currently recognized as distinct. Some species of the tribe Abrotrichini are called akodons.

The genus contains the following species: [3]

Footnotes

  1. In 2010, this species was split from A. lutescens to include the formerly recognized A. aliquantulus. [4]
  2. This species includes the formerly recognized A. molinae. [5]
  3. 1 2 This species was split from A. simulator in 2008. [5]
  4. Newly described in 2005. [6]
  5. Newly described in 2010. [4] This species includes Akodon viridescens, [7] another new species described in 2010. [8]
  6. This species includes the previously recognized A. leucolimnaeus [4] and A. oenos. [9]

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<span class="mw-page-title-main">Akodontini</span> Tribe of rodents

Akodontini is the second most speciose rodent tribe of the subfamily Sigmodontinae. It includes at least 106 living species in 19 genera and is distributed mainly in the southern half of South America, with only two genera extending into Guyana (Podoxymys) and Venezuela (Necromys). It also includes genera previously placed in tribe Scapteromyini. The following genera are now generally recognized:

<i>Oxymycterus</i> Genus of rodents

Oxymycterus is a genus of rat-like rodents commonly known as hocicudos. They are endemic to South America. As of April 2019, the genus contains the following 16 species:

The cursor grass mouse, or cursorial akodont, is a sigmodontine rodent from South America.

<span class="mw-page-title-main">Gray leaf-eared mouse</span> Species of rodent

The gray leaf-eared mouse is a rodent species from South America. It is found in Argentina, Bolivia, Brazil and Paraguay; its habitat includes the Gran Chaco.

<i>Lundomys</i> A semiaquatic rat species from southeastern South America.

Lundomys molitor, also known as Lund's amphibious rat or the greater marsh rat, is a semiaquatic rat species from southeastern South America.

<i>Pseudoryzomys</i> Genus of rodent from South America with one species

Pseudoryzomys simplex, also known as the Brazilian false rice rat or false oryzomys, is a species of rodent in the family Cricetidae from south-central South America. It is found in lowland palm savanna and thorn scrub habitats. It is a medium-sized species, weighing about 50 grams (1.8 oz), with gray–brown fur, long and narrow hindfeet, and a tail that is about as long as the head and body. The IUCN has assessed its conservation status as being of least concern, although almost nothing is known about its diet or reproduction.

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.

<i>Akodon spegazzinii</i> Rodent in the family Cricetidae found in northwestern Argentina

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.

<i>Akodon sylvanus</i> Species of rodent

Akodon sylvanus, also known as the forest grass mouse or woodland akodont, is a species of rodent in the family Cricetidae. It is found only in a small part of northwestern Argentina.

<i>Abrothrix</i> Genus of rodents

Abrothrix is a genus of rodent in the tribe Abrotrichini of family Cricetidae. It contains the following living 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.

<i>Akodon caenosus</i> Species of rodent

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.

<span class="mw-page-title-main">Oryzomyini</span> Tribe of rodents

Oryzomyini is a tribe of rodents in the subfamily Sigmodontinae of the family Cricetidae. It includes about 120 species in about thirty genera, distributed from the eastern United States to the southernmost parts of South America, including many offshore islands. It is part of the clade Oryzomyalia, which includes most of the South American Sigmodontinae.

The delicate salt flat mouse is a sigmodontine rodent species in the family Cricetidae from South America. It is the only species in the genus Salinomys. Its habitat is scrublands bordering salt flats in the Monte Desert area of central western Argentina at elevations around 400 m. The closest relatives of the species are the chaco mice (Andalgalomys).

In anatomy, posterolateral palatal pits are gaps at the sides of the back of the bony palate, near the last molars. Posterolateral palatal pits are present, in various degrees of development, in several members of the rodent family Cricetidae. Many members of the family lack them or have only simple pits, but Arvicolinae and Oryzomyini have more highly developed posterolateral palatal pits. Posterolateral palatal pits are also present in some other rodents, including Glis, Jaculus, Hystrix, Abrocoma, Ctenomys, Chinchilla, and Lagidium.

<span class="mw-page-title-main">Abrotrichini</span> Tribe of rodents

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.

In mammals, ungual tufts are tufts of hairs at the base of claws of the forefeet and hindfeet. Their presence has been used as a character in cladistic studies of the Cricetidae, a large family of rodents.

Akodon polopi is a species of rodent in the family Cricetidae. It is found in Argentina.

References

  1. Musser and Carleton, 2005, p. 1093
  2. González, E.M.; Pardiñas, U.F.J. (2002). "Deltamys kempi". Mammalian Species (711): Number 711: pp. 1–4. doi:10.1644/1545-1410(2002)711<0001:DK>2.0.CO;2. S2CID   198968620.
  3. Musser and Carleton, 2005, pp. 1092–1100
  4. 1 2 3 Jayat et al., 2010
  5. 1 2 Braun et al., 2008
  6. Pardiñas et al., 2005
  7. Braun et al., 2010
  8. D'Elía et al., 2011
  9. Pardiñas et al., 2011

Literature cited