Choanomphalus maacki explained

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.^[1]

Subspecies

• Choanomphalus maacki maacki Gerstfeldt, 1859^[1]
• Choanomphalus maacki andrussowianus (Lindholm, 1909)^{[1] [2]}
• Choanomphalus maacki elatior Lindholm, 1909^{[1] [2]}

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.^[3] The height of the shell is 2.5–3.0 mm.^[3]

Notes and References

1. Kantor Yu I., Vinarski M. V., Schileyko A. A. & Sysoev A. V. (published online on March 2, 2010). "Catalogue of the continental mollusks of Russia and adjacent territories". Version 2.3.1.
2. Lindholm W. A. (1909). "Die Mollusken des Baikal-Sees (Gastropoda et Pelecypoda) systematisch und zoogeographisch bearb". Wissenschaftliche Ergebnisse einer zoologische Expedition nach dem Baikal-See unter Leitung des Prof. Alexis Korotneff i. d. J. 1900–1902, 4. Kiew und Berlin, Fridländer und Sohn: 1–104. page 10, plate 2, fig. 28–30; page 13, plate 2, fig. 25–27.
3. Bourguignat J. R. (1860). "Monographie du genre Choanomphalus". Revue et Magasin de Zoologie, série 2, 12: 527–531. plate 23.