This species, described in 1999, was originally only known from two sites in south-west Madagascar: Analavelona Massif and Vohibasia, about 70 km apart, and at elevations between 780 and 1,050 m asl. No other records were known until 2006, when two additional specimens were taken in the Menabe region at a notable distance from the sites of the type series and in a different habitat (Soarimalala and Goodman 2007). One specimen was taken in Foret dâAmboropotsy (Kirindy CFPF) and another in the Foret de Lambokely. In February and March 2007, three different sites in the Kirindy-Mitea National Park were surveyed and 198 pit-fall trap days were accrued at each site and no individual of M. nasoloi was captured; further, no sign of this species was found during extensive small mammal surveys in the zone north of the Tsiribihina River (Soarimalala and Goodman 2007).
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