Knotty pebblesnail

The knotty pebblesnail, scientific name Somatogyrus constrictus, of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama in the United States. Its natural habitat is the Coosa River. Although the IUCN officially categorises the species as Data Deficient, it also considers it as Possibly extinct, as it has not been recorded since the river was impounded. This latter classification is also supported by The Nature Conservancy.^[2] The taxonomic validity of this species has been questioned; it may represent morphological aberrations of other, valid species.^[1][3] If it is a valid species, it would be assessed as threatened.^[1]

Knotty pebblesnail
Conservation status
Data Deficient  (IUCN 3.1)[1]
Possibly Extinct  (NatureServe)[2]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Neotaenioglossa
Family:	Lithoglyphidae
Genus:	Somatogyrus
Species:	S. constrictus
Binomial name
Somatogyrus constrictus Walker, 1904

References

1. Cordeiro, J. (2011). "Somatogyrus constrictus". IUCN Red List of Threatened Species. 2011: e.T20353A9190379. doi:10.2305/IUCN.UK.2011-2.RLTS.T20353A9190379.en. Retrieved 15 November 2021.
2. "Somatogyrus constrictus". NatureServe Explorer An online encyclopedia of life. 7.1. NatureServe. Retrieved 12 October 2023.
3. Clark, Stephanie (2007). "Preliminary survey of the Hydrobiidae of Alabama" (PDF). Alabama Department of Conservation and Natural Resources. Archived from the original (PDF) on 16 September 2012. Retrieved 7 April 2012.