Angular pebblesnail

The angular pebblesnail, scientific name Somatogyrus biangulatus, is a species of very small freshwater snail with an operculum, an aquatic operculate gastropod mollusc in the Lithoglyphidae family. This species is endemic to Alabama in the United States. Its natural habitat is Muscle Shoals region of the Tennessee 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.[1] This latter classification is also supported by The Nature Conservancy.[2]

Angular pebblesnail

Possibly Extinct  (NatureServe)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Neotaenioglossa
Family: Lithoglyphidae
Genus: Somatogyrus
Species:
S. biangulatus
Binomial name
Somatogyrus biangulatus
Walker, 1906

The taxonomic status of S. biangulatus is unclear, as it is morphologically similar to other species. Based on its shell characteristics, it may well be a member of Marstonia.[3]

References
  1. Cordeiro, J.; Perez, K. (2011). "Somatogyrus biangulatus". IUCN Red List of Threatened Species. 2011: e.T20352A9190181. doi:10.2305/IUCN.UK.2011-2.RLTS.T20352A9190181.en. Retrieved 16 November 2021.
  2. "Somatogyrus biangulatus". NatureServe Explorer An online encyclopedia of life. 7.1. NatureServe. Retrieved 11 October 2023.
  3. Clark, S.A. 2007. Preliminary survey of the Hydrobiidae of Alabama. Final report prepared for Alabama Department of Conservation and Natural Resource. Wildlife and Freshwater Fisheries Division, Montgomery, Alabama
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