Arrhinoceratops was by Parks placed within the Ceratopsia (this name is Ancient Greek for "horned faces"), a group of herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period, which ended roughly 66 million years ago.
In 1930 Lori Russell refined this to the Ceratopsidae.
Tyson concluded it was closely related to Torosaurus, probably even its direct ancestor.

Modern research indicates that Arrhinoceratops is a member of the Chasmosaurinae.
Cladistic analyses recover it close to Anchiceratops.

The following cladogram shows the phylogeny of Arrhinoceratops according to a study by Scott Sampson e.a.
in 2010.
Arrhinoceratops was by Parks placed within the Ceratopsia (this name is Ancient Greek for "horned faces"), a group of herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period, which ended roughly 66 million years ago. In 1930 Lori Russell refined this to the Ceratopsidae. Tyson concluded it was closely related to Torosaurus, probably even its direct ancestor.
Modern research indicates that Arrhinoceratops is a member of the Chasmosaurinae. Cladistic analyses recover it close to Anchiceratops.
The following cladogram shows the phylogeny of Arrhinoceratops according to a study by Scott Sampson e.a. in 2010.
Arrhinoceratops