Choanomphalus maacki
# Choanomphalus maacki

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

Choanomphalus maacki is the type species of the genus Choanomphalus.

## Subspecies

* Choanomphalus maacki maacki Gerstfeldt, 1859
* Choanomphalus maacki andrussowianus (Lindholm, 1909)
* Choanomphalus maacki elatior Lindholm, 1909

However, IUCN Red List 2013 lists these three as synonyms.

## Distribution

This species is found in Lake Baikal, Russia. Its natural habitats are freshwater lakes and river mouths.

## Description

The width of the shell is 5–6 mm. The height of the shell is 2.5–3.0 mm.

| Apical view of the shell. | Umbilical view of the shell. |
| - | - |
