text: * Orbifold signature: 
  * Coxeter notation: [(&infin;,2),&infin;] or [&infin;,(2,&infin;)]
  * Lattice: rectangular
  * Point group: D
  * The group pmg has two rotation centres of order two (180°), and reflections in only one direction. It has glide reflections whose axes are perpendicular to the reflection axes. The centres of rotation all lie on glide reflection axes.
  ;Examples of group pmg