title: Choanomphalus aorus
text: # Choanomphalus aorus
  
  Choanomphalus aorus is a species of freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids.
  
  ## Distribution
  
  This species is found in Lake Baikal, Russia and in Angara River.
  
  ## Description
  
  The width of the shell is 5 mm; the height of the shell is 3 mm.
  
  | Apical view of the shell. | Umbilical view of the shell. |
  | - | - |
  