Lesser Wilfred's mouse

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]

Lesser Wilfred's mouse
Scientific classification
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

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]

References
  1. Geise, L. & Pardinas, U. (2008). "Juliomys pictipes". IUCN Red List of Threatened Species. 2008. Retrieved 23 March 2011.CS1 maint: ref=harv (link)
  2. 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. Beolens, Bo. (2009). The eponym dictionary of mammals. Watkins, Michael, 1940-, Grayson, Michael. Baltimore: Johns Hopkins University Press. ISBN 9780801895333. OCLC 593239356.
  4. "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.
  7. "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 2019-11-19.
  8. 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. 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. "Lesser Wilfred's mouse | Wilfredomys pictipes facts". thewebsiteofeverything.com. Retrieved 2019-09-30.
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