Odontophrynus americanus
It is found in central and northern Argentina , Uruguay , southern Brazil , and southern Paraguay . 
<triplet> Argentina <subj> Paraguay <obj> shares border with <triplet> Uruguay <subj> Brazil <obj> shares border with <triplet> Brazil <subj> Paraguay <obj> shares border with <triplet> Paraguay <subj> Argentina <obj> shares border with <subj> Brazil <obj> shares border with