Original: The Marco Polo sheep Ovis ammon polii was first described by Indian zoologist Edward Blyth in 1841 , while another subspecies of Ovis ammon , the Siberian or Altai argali , was left as the nominal subspecies Ovis ammon ammon .
Simplified: Marco Polo sheep ( Ovis ammon polii ) is a wild sheep , and a subspecies of the Argali .