The Mogai-class (also referred to as Valdore-type, Valdore-class, or Norexan-class), was a kind of Romulan warbird in service in the late 2370s and early 2380s.
The class is unnamed in its original appearance in Star Trek Nemesis, and Memory Alpha's article uses the name Valdore-type after the only canonically named example of the class. Some post-Nemesis novels refer to the design as Valdore-class, while other novels and Star Trek Online dub it the Mogai-class. The name Norexan-class is given in the Star Trek Customizable Card Game.