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
an apertural view of the shell of Choanomphalus maacki maacki
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Planorbidae
Genus:	Choanomphalus
Species:	C. maacki
Binomial name
Choanomphalus maacki Gerstfeldt, 1859[2]
Synonyms[3]
of C. maacki maacki: Choanomphalus bicarinatus W. Dybowski, 1901[4] Choanomphalus mesospiralis B. Dybowski & Grochmalicki, 1925[5] of C. maacki andrussowianus: Choanomphalus elatospiralis B. Dybowski & Grochmalicki, 1925 Choanomphalus andrussovianus B. Dybowski & Grochmalicki, 1925 of C. maacki elatior: Choanomphalus korotnevi elatior Lindholm, 1909

Choanomphalus maacki is the type species of the genus Choanomphalus.^[3]

Subspecies

• Choanomphalus maacki maacki Gerstfeldt, 1859^[3]
• Choanomphalus maacki andrussowianus (Lindholm, 1909)^[3][6]
• Choanomphalus maacki elatior Lindholm, 1909^[3][6]

However, IUCN Red List 2013 lists these three as synonyms.^[1]

Distribution

This species is found in Lake Baikal, Russia.^[1] Its natural habitats are freshwater lakes and river mouths.^[1]

Description

The width of the shell is 5–6 mm.^[7] The height of the shell is 2.5–3.0 mm.^[7]

Apical view of the shell.

Umbilical view of the shell.