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Delicate salt flat mouse
:''Not to be confused with the little native mouse (Pseudomys delicatulus) of Australia or the delicate mouse (Mus tenellus) of Africa.''
The delicate salt flat mouse, ''Salinomys delicatus'', (in Spanish, el ratón delicado de los salares) 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 (such as those of the Salinas Grandes) 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'').〔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 but has 2n = 19 in males. 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.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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