Lesser Wilfred's mouse

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Lesser Wilfred's mouse
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Genus: Juliomys
Species:
J. pictipes
Binomial name
Juliomys pictipes
Osgood, 1933
Synonyms

Thomasomys pictipes
Wilfredomys pictipes

The lesser Wilfred's mouse (Juliomys pictipes) is a species of South American rodents of the family Cricetidae. [2] It was first described by Wilfred H. Osgood under the name Thomasomys pictipes, then into the genus Wilfredomys, and now known as Juliomys pictipes. [3] The lesser Wilfred's mouse is endemic to northeastern Argentina and southeastern Brazil. [4] Its physical appearance ranges from dark brown to light orange coloration and the typical size is small to medium. [3] This species is arboreal, spending most of its time trees and living in the local forests at altitudes from sea level to 2000 m. [1] Currently, this species is listed as Least Concern by the IUCN, but, threats include livestock farming, ranching, and wood harvesting. [4]

Contents

Taxonomy

Juliomys pictipes was first discovered by Osgood in 1933. [5] It was originally named Thomasomys pictipes. [6] [3] For several decades, the placement of this species was uncertain and fairly recently changed to Juliomys pictipes to fit under the subfamily of Sigmodontinae rodents. [2] Currently, there are three species under the genus of Juliomys. The taxon identifier is 89132. [7]

Description

This animal is considered to be small to medium sized Sigmodontinae rodents. [2] They are dark-brown to light-orange brown. [7] Other characteristics include having long soft fur with a brownish ochraceous dorsum. [8] This small-bodied animal is a pentalophodont with a tail longer than its head and body. [9] Juliomys pictipes have short, broad feet with 6 plantar pads. [3] In addition, the skull has identifying features including having a short rostrum and rounded braincase. [2] Another diagnostic characteristic is the presence of an open slit in the suture between the frontal bones. Lastly, its karyotype has 2n = 36, FN = 34. [8]

Distribution and habitat

It is found in northeastern Argentina and southeastern Brazil and limited to the tropical and subtropical moist forests of those countries. [9] The type locality was first discovered in Misiones, Argentina and occurs in the Atlantic forest. [10]

Ecology

The species is arboreal. [7] A baby of this species is often called a pinkie, kitten or pup. [7] The females are called doe and males are called buck. [7] Groups of this species are called a nest, colony, harvest, horde or mischief. [11]

Status

The Lesser wilfred's mouse is listed as Least Concern. [11] But, threats that increase mortality or decrease quality of life include livestock farming, ranching, and wood harvesting. [4]

Related Research Articles

<span class="mw-page-title-main">Sigmodontinae</span> Subfamily of rodents

The rodent subfamily Sigmodontinae includes New World rats and mice, with at least 376 species. Many authorities include the Neotominae and Tylomyinae as part of a larger definition of Sigmodontinae. When those genera are included, the species count numbers at least 508. Their distribution includes much of the New World, but the genera are predominantly South American, such as brucies. They invaded South America from Central America as part of the Great American Interchange near the end of the Miocene, about 5 million years ago. Sigmodontines proceeded to diversify explosively in the formerly isolated continent. They inhabit many of the same ecological niches that the Murinae occupy in the Old World.

The Brazilian shrew mouse, also known as the blarinine akodont, is a rodent in the tribe Akodontini from the Atlantic Forest of eastern and southeastern Brazil. It is the only species in the genus Blarinomys. Phylogenetic analysis suggest that there are two clear geographical clades, a northeastern and southeastern.

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

<i>Euryoryzomys russatus</i> Species of mammal (rodent)

Euryoryzomys russatus, also known as the russet oryzomys, russet rice rat, or big-headed rice rat, is a species of rodent in the family Cricetidae. It is a member of the genus Euryoryzomys, which was split off from Oryzomys in 2006. It was first described by Johann Andreas Wagner in 1848. It is found in southern Brazil, eastern Paraguay and northeastern Argentina. It is considered a large species in its genus, with a reddish-brown coat, long tail length, and large skull. It is a terrestrial rodent, spending its time foraging for seeds, fruits, and insects. It is listed by the IUCN as least concern, although studies have shown it to be influenced by anthropogenic disturbances. Predators consist of small members of the order Carnivora.

<i>Oligoryzomys flavescens</i> Species of rodent

Oligoryzomys flavescens, also known as the flavescent colilargo or yellow pygmy rice rat is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in southern South America, occurring in southern Brazil, Paraguay, Uruguay, and northeastern Argentina. Its karyotype has 2n = 64-66 and FNa = 66–70.

<i>Oligoryzomys nigripes</i> Species of rodent

Oligoryzomys nigripes, also known as the black-footed colilargo or the black-footed pygmy rice rat, is a rodent in the genus Oligoryzomys of family Cricetidae. Oligoryzomys nigripes is a species that has been further divided into different sister taxa throughout history. It is found in different countries in South America. It is a large species with long ears, dark yellow to dark brown upperparts, sharply delimited from the whitish underparts, and often a pink girdle on the chest. This species of rat spends much of its life among the trees. The karyotype is 2n = 62, FNa = 78–82.

<span class="mw-page-title-main">Greater Wilfred's mouse</span> Species of rodent

The greater Wilfred's mouse is a rodent species from South America. It is found in southern Brazil and Uruguay in subtropical lowland forest. It is arboreal to some degree. It is the only species in the genus Wilfredomys.

<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.

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.

Oligoryzomys fornesi, also known as Fornes' colilargo, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found from northeastern Brazil via Paraguay into northeastern Argentina. Its karyotype has 2n = 62 and FNa = 64.

<span class="mw-page-title-main">Cerrado climbing mouse</span> Species of rodent

The cerrado climbing mouse or long-tailed rhipidomys is an arboreal rodent species in the family Cricetidae from South America. It is found in primary or secondary forests of the cerrado and caatinga in central and eastern Brazil, and has also been seen in the Atlantic Forest. Its karyotype is 2n = 44, FN = 48-52. They are nocturnal animals and can be found in both tree canopies and on the ground.

Anita's leaf-eared mouse is a species of rodent in the family Cricetidae. It was discovered in Tucumán Province in northwestern Argentina in alder forest of the upper part of the Southern Andean Yungas ecoregion, on the eastern slopes of the Andes. The species is terrestrial and nocturnal, and was named after American zoologist Anita K. Pearson. It appears to be most closely related to the bunchgrass leaf-eared mouse.

<i>Juliomys anoblepas</i> Species of rodent

Juliomys anoblepas is a rodent in the genus Juliomys of the subfamily Sigmodontinae known from a single broken skull. The specimen was collected by Peter Wilhelm Lund in the caves of Lagoa Santa, Minas Gerais, Brazil, in the first half of the 19th century and described by Herluf Winge in 1888 as Calomys anoblepas. The species remained unstudied and its affinities unclear until 2011, when it was recognized as a member of the genus Juliomys, which includes three other species from southern Brazil and nearby Argentina and Paraguay. J. anoblepas is probably a separate extinct species of the genus, which is no longer found at Lagoa Santa.

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.

<i>Juliomys</i> Genus of rodents

Juliomys is a genus of South American rodents of the family Cricetidae. Five species are known, all found in Argentina and Brazil. They are as follows:

Rhagomys is a genus of South American rodents in the tribe Thomasomyini of the family Cricetidae. Two species separated by about 3100 km are known, from southeast Peru and Bolivia east of the Andes, and in the Atlantic Forest of southeast Brazil. An undetermined species of Rhagomys has also been reported from Mato Grosso in central Brazil. The species are as follows:

Wilfred's Mouse may refer to several southern Brazilian and Argentine rodents:

Juliomys ossitenuis is a species of rodent in the family Cricetidae native to South America.

Pardiñas’ Andean mouse is a species of sigmodontine rodent in the family Cricetidae known from the Cordillera del Cóndor and Cordillera de Kutukú, Ecuador. The species is named after Argentine palaeontologist Ulyses Pardiñas.

References

  1. 1 2 Geise, L. & Pardinas, U. (2008). "Juliomys pictipes". IUCN Red List of Threatened Species . 2008. Retrieved 23 March 2011.
  2. 1 2 3 4 Pardiñas, Ulyses F. J.; Teta, Pablo; D’elía, Guillermo; Galliari, Carlos (2008-04-28). "Rediscovery of Juliomys pictipes (Rodentia: Cricetidae) in Argentina: emended diagnosis, geographic distribution, and insights on genetic structure". Zootaxa. 1758 (1): 29–44. doi:10.11646/zootaxa.1758.1.2. ISSN   1175-5334.
  3. 1 2 3 4 Beolens, Bo. (2009). The eponym dictionary of mammals. Watkins, Michael, 1940-, Grayson, Michael. Baltimore: Johns Hopkins University Press. ISBN   9780801895333. OCLC   593239356.
  4. 1 2 3 "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 2019-09-22.
  5. ↑ Paresque, Roberta; Christoff, Alexandre Uarth; Fagundes, Valéria (2009). "Karyology of the Atlantic forest rodent Juliomys (Cricetidae): a new karyotype from southern Brazil". Genetics and Molecular Biology. 32 (2): 301–305. doi:10.1590/S1415-47572009005000031. ISSN   1415-4757. PMC   3036929 . PMID   21637684.
  6. ↑ de Oliveira, Joao A.; Bonvicino, Cibele R. (2002-09-01). "A new species of sigmodontine rodent from the Atlantic forest of eastern Brazil". Acta Theriologica. 47 (3): 307–322. doi:10.1007/BF03194149. ISSN   2190-3743. S2CID   34916706.
  7. 1 2 3 4 5 "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 2019-11-19.
  8. 1 2 Musser, G.G.; Carleton, M.D. (2005). "Superfamily Muroidea". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1121. ISBN   978-0-8018-8221-0. OCLC   62265494.
  9. 1 2 Tomasi, Paulo S.; Valiati, Victor H.; Gonçalves, Juliana W.; Oliveira, Larissa R.; Vieira, Emerson M.; Christoff, Alexandre U. (2016-09-27). "A new species of Juliomys (Rodentia, Cricetidae, Sigmodontinae) from the Atlantic Forest of Southern Brazil". Journal of Mammalogy. 97 (5): 1469–1482. doi: 10.1093/jmammal/gyw082 . ISSN   0022-2372.
  10. ↑ "Wilfredomys pictipes (lesser Wilfred's mouse)". www.uniprot.org. Retrieved 2019-09-30.
  11. 1 2 "Lesser Wilfred's mouse | Wilfredomys pictipes facts". thewebsiteofeverything.com. Retrieved 2019-09-30.
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