Cross-species summary: Congenital abnormal shortness of the mandible (lower jaw), resulting in protrusion of the maxilla (upper jaw).

Species in which this phene is found:
dog (Canis lupus familiaris)
ass (Equus asinus)
horse (Equus caballus)
llama (Lama glama)
cattle (Bos taurus)
sheep (Ovis aries)
alpaca (Vicugna pacos)