What is "stephanorhinus"

Stephanorhinus or Merck's rhinoceros is an extinct genus of rhinoceros native to northern Eurasia that lived during the Lower to Early Late Pleistocene epoch. It had two horns and was a relatively large rhino. It weighed over 3,000 kg (6,600 lbs) and measured about tall and in length, having a size similar to a white rhino.