オスニエル・チャールズ・マーシュ
Protoceratidae was erected by Othniel Charles Marsh in 1891, with the type genus "Protoceras" and assigned to the Artiodactyla. It was later assigned to Pecora, and more recently to Ruminantia or Tylopoda. However, recently a relationship to chevrotains in the infraorder Tragulina has been proposed.