Choanomphalus amauronius

Choanomphalus amauronius is a species of freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids.

Subspecies

 * Choanomphalus amauronius amauronius Bourguignat, 1860
 * Choanomphalus amauronius angulatus (B. Dybowski & Grochmalicki, 1925)
 * Choanomphalus amauronius westerlundianus Lindholm, 1909 The subspecific name westerlundianus is in honor of Swedish malacologist Carl Agardh Westerlund.

Distribution
This species is found in Lake Baikal, Russia and in Angara River.

Description
The width of the shell is 5–6 mm. The height of the shell is 4 mm.