delicate salt flat mouse
{{Short description|Species of rodent}}
{{Distinguish|text=the little native mouse (Pseudomys delicatulus) of Australia or the delicate mouse (Mus tenellus) of Africa}}
{{Speciesbox
| name = Delicate salt flat mouse
| status = DD
| status_system = IUCN3.1
| genus = Salinomys
| parent_authority = Braun & Mares, 1995
| species = delicatus
| authority = Braun & Mares, 1995
}}
The delicate salt flat mouse{{cite book | last1 = Lanzone | first1 = C. | last2 = Braun | first2 = J. K. | editor1-last = Patton | editor1-first = J. L. | editor2-last = Pardiñas | editor2-first = U. F. J. | editor3-last = D’Elía | editor3-first = G. | editor1-link = James L. Patton | title= Mammals of South America, Volume 2: Rodents | url= https://books.google.com/books?id=mbjnBgAAQBAJ&pg=PA555 | date=9 March 2015 | publisher=University of Chicago Press | isbn=978-0226169606 | oclc = 921432000 | pages=555–556}} (Salinomys delicatus; {{langx|es| el ratón delicado de los salares}}{{cite journal|last1= Rodríguez|first1=Daniela|last2= Lanzone|first2=Cecilia|last3= Chillo|first3= Verónica|last4= Cuello|first4=Pablo A|last5= Albanese|first5= Soledad|last6= Ojeda|first6=Agustina A|last7= Ojeda|first7=Ricardo A|title=Natural history of a rare rodent of the Argentinean desert, Salinomys delicatus (Cricetidae: Sigmodontinae)|journal= Revista chilena de historia natural|volume= 85|issue=1|year= 2012|pages= 13–27|language= es|issn= 0716-078X|doi= 10.4067/S0716-078X2012000100002|doi-access= free|hdl= 11336/154555|hdl-access= free}}) is a sigmodontine rodent species in the family Cricetidae from South America. It is the only species in the genus Salinomys.{{MSW3 Muroidea | id = 13000902 | page = 1172}} Its habitat is scrublands bordering salt flats (such as those of the Salinas Grandes) in the Monte Desert area of central western Argentina at elevations around 400 m.{{cite journal
| last = Braun | first = Janet K. |author2=Mares, Michael A.
| title = A new genus and species of phyllotine rodent (Rodentia: Muridae: Sigmodontinae: Phyllotini) from South America
| journal = Journal of Mammalogy | volume = 76 | issue = 2 | pages = 504–521
| publisher = American Society of Mammalogists | date = May 1995
| doi = 10.2307/1382359| jstor = 1382359 }} The closest relatives of the species are the chaco mice (Andalgalomys).Steppan, S.J.; Ramirez, O.; Banbury, J.; et al. 2007. A molecular reappraisal of the systematics of the leaf-eared mice Phyllotis and their relatives. In: Kelt, D.A., E.P. Lessa, J. Salazar-Bravo & J.L. Patton (eds.), The Quintessential Naturalist: Honoring the Life and Legacy of Oliver P. Pearson. University of California Publications in Zoology. Volume 134, pp. 799–826. University of California Press, Berkeley. http://escholarship.org/uc/item/9g62053v#page-812
Karyotype
Its karyotype has 2n = 18 and FN = 32 in females{{cite journal
| last1 = Lanzone | first1 = C. | last2 = Ojeda | first2 = R. A. | last3 = Albanese | first3 = S. | last4 = Rodríguez | first4 = D. | last5 = Dacar | first5 = M.
| title = Karytypic characterization and new geographical record of Salinomys delicatus (Rodenta, Cricetidae, Sigmodoninae)
| journal = Mastozoología Neotropical
| volume = 12 | issue = 2 | pages = 257–260 | date = 2005
| url = http://personal.cricyt.edu.ar/rojeda/salinomys.pdf
| access-date = 2014-07-25}} but has 2n = 19 in males.{{cite journal|last1=Lanzone|first1=C.|last2=Rodríguez|first2=D.|last3=Cuello|first3=P.|last4=Albanese|first4=S.|last5=Ojeda|first5=A.|last6=Chillo|first6=V.|last7=Martí|first7=D. A.|title=XY1Y2 chromosome system in Salinomys delicatus (Rodentia, Cricetidae)|journal= Genetica|volume=139|issue= 9|year=2011|pages= 1143–1147|issn= 0016-6707|doi= 10.1007/s10709-011-9616-7|hdl=11336/150390|hdl-access=free}} Due to an X-autosome translocation, S. delicatus has an XY1Y2 sex chromosome system, rare in mammals. During meiotic prophase, a male's X and two Y chromosomes form a trivalent. The female value of 18 is the lowest diploid number of any species in the tribe Phyllotini. Given that close relative Andalgalomys pearsoni has the highest known diploid number (78) of the tribe, it appears that major chromosome restructuring occurred during the evolution of the Andalgalomys-Salinomys clade.
Conservation status
While not formally assessing its conservation status, the IUCN has stated, "This species occurs in a very narrow range of ecological requirements (salt flats) which are severely fragmented and which could be threatened by human disturbance."
References
{{Reflist}}
{{Myomorpha|E.|state=collapsed}}
{{Taxonbar|from=Q310806}}
Category:Mammals described in 1995
{{Cricetidae-stub}}