 Until the late 1980s , as many as 32 subspecies were recorded ; genetic study of mitochondrial DNA found many of these are too similar to be recognized as distinct at a molecular level . Following the research , the canonical Mammal Species of the World ( 3rd ed . ) recognizes six subspecies , five of which are solely found in Latin America : 
 Until the late 1980s , as many as 32 subspecies <a href='uninflect' title='1'><mark>were</mark></a> recorded ; genetic study of mitochondrial DNA found many of these are too similar to be recognized as distinct at a molecular level . Following the research , the canonical Mammal Species of the World ( 3rd ed . ) <a href='uninflect' title='2'><mark>recognizes</mark></a> six subspecies , five of which are solely found in Latin America : 
Till the late 1980s , as many as 32 subspecies was recorded ; genetic study of mitochondrial DNA found many of these are too similar to be recognized as distinct at a molecular level . Following the research , da canonical Mammal Species of tdaWorld ( 3rd ed . ) recognize six subspecies , five of which r solely found in Latin America :