... that B. borealis is the sister taxon of Dimetrodon grandis , which is supported by dental characters: crowns with mesial and distal denticles and roots elongate, lacking plicidentine. An autapomorphy of B. borealis is the large facial exposure of the septomaxilla. As Bathygnathus has priority over...

... be related to these earliest reports. Other finds have likewise laid claim to be ‘Canada’s first dinosaur’, but these have been shown to represent the remains of other non-dinosaurian vertebrates, including ‘ Bathygnathus ’ (= Dimetrodon ) borealis and Arctosaurus osborni (more on these early histories...

... postorbital skull table this leads to the shortening of the supratemporal, which is approximately as long as wide and is one of the proportionally shortest supratemporals in eryopids. Only in Clamorosaurus borealis Gubin, 1983 , is the supratemporal much wider than long (RW and FW in preparation...