Akodon spegazzinii is found in northwestern Argentina, in the provinces of Salta, Catamarca, Tucumán, La Rioja, and Mendoza, at altitudes of . Although its main distribution is in the northern provinces of Salta, Tucumán, and Catamarca, there are also scattered records from the more southern provinces of La Rioja and Mendoza, where it is likely restricted to patches of wet habitat. "Akodon alterus" has been reported from Jujuy, but this record was likely based on misidentified specimens of "A. boliviensis", and records of "Akodon spegazzinii" from Jujuy were based on misidentified "A. sylvanus". "Akodon spegazzinii" is known from a paleontological site in
Formosa, Ontario Formosa, Ontario Formosa is a community located in the municipality of South Bruce, in Bruce County, Ontario, Canada. Prominent features of Formosa include: Neighbouring towns include Mildmay and Walkerton. The postal code for the hamlet is N0G 1W0. Rev. Gaspar Matoga, a Jesuit missionary, visited the area in January 1853, on one of many trips to minister to the new settlements of the region. Upon seeing the valley in which the present day hamlet is situated, he described it as "formosa", the Latin word for beautiful. The new community of Formosa had a school as early as 1854. There have