Acarechimys is an extinct genus of caviomorph rodent that lived in South America during the Miocene epoch.
Distribution Acarechimys minutus is known from Argentina, Chile, and Bolivia. Acarechimys minutissimus is known from Argentina and Colombia, with remains tentatively identified as Acarechimys cf. minutissimus known from Bolivia and Chile as well. Acarechimys constans is only known from Argentina and Chile, while Acarechimys gracilis is exclusively known from Argentina, as is Acarechimys leucotheae. Acarechimys manumanta is known from Peru. Acarechimys hunikuini is known from Brazil.
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