Reithrodon auritus (Fischer, 1814) . Zoognosia, 3:71.

TYPE LOCALITY: Argentina, Buenos Aires Prov., pampas south of Buenos Aires, south bank of the Rio de la Plata .

DISTRIBUTION: Argentina, adjacent Chile, and Uruguay.

SYNONYMS: caurinus, cuniculoides, currentium, evae, flammarum, hatcheri, marinus, obscurus, pachycephalus, pampanus, physodes, typicus .

COMMENTS: The taxa associated here follow Osgood (1943) and Hershkovitz (1959a), whose listings of probable synonyms require substantiation, as does the formal stabilization of the proper name as auritus Fischer, 1814, versus physodes Olfers, 1818.