Cross-species summary: Congenital absence of the anus, causing a buildup of faeces and consequent distension of the abdomen.

Species in which this phene is found:
domestic cat (Felis catus)
pig (Sus scrofa)
llama (Lama glama)
cattle (Bos taurus)
goat (Capra hircus)
sheep (Ovis aries)
alpaca (Vicugna pacos)