Dinosaurs Unassessed

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Why isn't Labocania in the family Tyrannosauridae? It's got the same body structure and it lived at the time of most other Tyrannosaurids. Benosaurus 16:55, 22 January 2007 (UTC)[reply]

Basically, because it's more primitive. Tyrannosauridae is defined as the most restrictive group containing Tyannosaurus, Albertasaurus, and Gorgosaurus. Anything more primitive than the common ancestor of those three is excluded, and goes into the broader superfamily Tyrannosauroidea. Dinoguy2 22:01, 22 January 2007 (UTC)[reply]

Although it has a few tyrannosaurid-like characters, the referral of Labocania to the Tyrannosauroidea is questionable. It might be a tyrannosauroid, but better material is required to confirm this.